Sophie, I don’t think glycolic/AHA will do much for your feet as they work predominantly on the upper surface layer whereas BHA/Urea work deeper down. Did come across this article, The Best Natural Deodorant Is Acid which makes for an interesting read. I’ve actually been doing this for a while with acid remnants after doing my face as the skin under my armpits tend to darken. I had been noticing that I hardly have a need for deodorant these days but hadn’t really pinpointed it to the acid use.
mint, did the oily thing happen before using the cream too or is it the first time? I’m not sure on the FAB cream, I’m not a fan of the brand as it markets itself as being for ultra sensitive skin but it’s not really accurate, it’s more for mildy sensitive skin/normal compromised skin.
enid, have you made your appointment yet? 
On the parched skin front, I’ve been keeping an eye lately on the Eucerin lineup as they’ve been overhauling their formulations (they used to have parabens in most things, all gone now, and they’ve stripped some other irritants out). I’m thinking the Aquaporin Active for Normal to Combination skin may be good for you. It uses a special version of glycerin (Glyceryl Glucoside) for hydration rather than HA and the INCI is enticingly short (no shea, but it does contain dimethicone, can’t remember if you’re okay with that or not):
INCI: Aqua Glycerin Glyceryl Glucoside Dicaprylyl Carbonate Distarch Phosphate Glyceryl Stearate Citrate Dimethicone Myristyl Myristate Octyldodecanol C12-15 Alkyl Benzoate Cetearyl Alcohol Butylene Glycol Carbomer Sodium Polyacrylate Alcohol Denat Phenoxyethanol
JDSTER is it in shade 2?
Tant, sounds like the anti-inflammatory properties of the meds are helping inflammation in the skin, probably worth investigating whether you do or don’t have proper rosacea considering the response. 
, hope the gums are finally responding too now.
Lone, if budget is an issue, for HA serums Japan comes in far cheaper. In the realms of Hylamide and TO Buffet you can get the Hada Laba Premium lotion for the same or less money incl. delivery from Japan and it’s a 200ml bottle. There are lighter versions too, just sort of depends how dehydrated you are but the premium is the most serum like.
Speaking of Japan, Sofia, for the eternal marks, whilst impatiently waiting for mine to fade I remembered that I really should have the Melano CC Intensive Anti Spot Essence in my emergency cupboard. It’s a targeted Vit C treatment for fading spot marks left behind and they healed so much quicker for me using that. It does contain fragrance but miraculously it never irritated me.
MrsD, ahem, you start with wouldn’t say my skin is sensitive but it doesn’t like too much handling and is prone to flushing. Very pale and burn easily and have always had quite pink and rosy cheeks, exacerbated by being outside, hot and cold temperatures, wind, too much playing around and I blush easily.
I would say you’re sensitive, and possibly rosacea prone. Probably not oily either if you were able to tolerate Nivea, I think possibly your regime of soap (very stripping) and a very heavy occlusive cream encouraged excess oil. Are you a (heavy) makeup wearer? Your current regime is again heavy on occlusives, so whilst perhaps more skin friendlier products, it’s much of the same.
Onto the giant list of things you’d like to try. Yes, the appetite for the new is probably clouding your judgement. Keep it simple is the general mantra here, you don’t need a lot, you’ve done the best you can for anti-ageing by always using SPF50. I’d focus next on:
A Retinol/Prescription Vitamin A
It’s not for the young, it’s for the ageing (so that’s basically anyone over 25), the OTC generally for a budget and/or preventative standpoint and the prescription stuff once there is actual signs of ageing/you’re officially in the mature category/acne issues. However, if you are sensitive/have rosacea the prescription stuff is a tough ask sometimes.
A Vitamin C (L-AA in hydrous solution preferably) product for replenishing depleting supplies and general environmental protection
A moisturiser with Niacinamide (I’m assuming you’re looking into this for dilated pores, which I would guess are more age related and the long term oily conditions of your skin, I don’t see Niacinamide as a miracle problem solver for that. Prescription Tret is your best hope for improving that, in this scenario, the Niacinamide is a good soothing agent for the side effects).
One Acid exfoliator, if you need one, if you’re going down the Prescription Tret route, you won’t need one as that will do it all on its lonesome. Acid is the last thing to contemplate in my book, you won’t know your legitimate acid needs (and what type) until your base routine is in good order.
As for the rest, galactomyces are great for dealing with dehydration for some, not for others. It’s an iffy product and I wouldn’t consider buying into it until you’re in an ‘ideal routine’ situation and able to gauge more objectively whether it truly adds something or not. Face Theory has lost a lot of love on here much in the same way TO is currently dropping heavily in favour, the formulations and substitution of ingredients led to inconsistent batches and made the brand unreliable, unfortunately.