Hi Lost and Sally,
Really sorry to hear you've also had health worries Lost, ours were very scary but at least over fast; I hope you get positive diagnosis soon and you can put your mind more at rest.
We're also finding DD1 has become quite prone to being upset at very small things. We think it's a combination of the new baby, plus visits from lots of peopple, travelling and also she's learning a lot e.g. potty (we're doing it slow and gradual, all praise-based, seems to be working well as she slides round on it even when not 'going'!). We try to deal with her tantrums by remembering that when toddlers are at their most "difficult", it's because emotionally they are struggling, and that is when they most need our help, support and love as parents, not disciplining. At least, this is my approach based on child psychology.
The wrap issue you have could be positioning, I would recommend posting on the FB group Wrap Jedi, friendly people can take a look at a selfie and advise. Or you might need to try a woven, plenty second hand bargains, they are way more supportive for you than stretchies.
Great you're feeling cheerful though. Our house isn't too bad surprisingly (for our standards, anyway!) but then there are two of us at home, even if I'm not doing hardly any housework!
Sally that's really wonderful to hear how much you are enjoying mummy life. I made the mistake first time round of feeling trapped by the constant feeding, this time I'm just rolling with it and it's much more fun as a result. Although actually this baby feeds less, probably as she's much bigger and doesn't need to fill her tummy as often! Means more settled nights too which I'm very grateful for.
My advice about your two Qs:
First of all, don;t stress too much about this, it's easy, I did it first time. Bed sharing if you do it safely and are breastfeeding is super beneficial for your baby, they receive close comfort, easy feeding, and your bodies actually attune e.g. breathing, pulse, waking rhythms, it's amazing. Don;t worry about squashing her, you are VERY unlikely to do that if you sleep in the correct position e.g. see this science-based advice site, they also do an app! www.dur.ac.uk/resources/isis.online/pdfs/ISIS_bed-sharing_2014.pdf
If you sleep with the baby now, it doesn't really matter about later in my opinion. They are small for such a short length of time, they will eventually sleep alone. Currently I am in the double bed with baby, husband sometimes starts the night with us, but DD1 is in her own room on a double futon, and DH goes in with her at some point as she still wakes up once most nights (she's 26 months) and needs a little comforting to go back to sleep. We think she benefits from knowing someone will always come in with her if she needs it, even though she starts the night by herself now (she goes to bed pretty easily most nights with books, or just lying together until she falls asleep if very tired). She went into her own room at about 18 months, before that time was sleeping in a cot next to our bed with bars up after night-weaning which happened sometime around 12 months. I still fed her to sleep if possible until 14 months, it was easiest by far, I put the bars up though at that point as she would often roll around and wake me up in the night. When she still had night feeds, I had the cot side taken off, and I would just roll in and lie next to her to feed, we would both go back to sleep like that.
About the vaccinations: remember why you're doing them first, it's for her life-long health, so you're being a good parent to her. We were recommended by our paediatrician to give a little bit of sugary water just before the injection, as it stimulates dopamine release in the brain which is a pain-killer, and then to offer her to nurse straight after the injections are done, as sucking does the same thing.
Another good thing to remember is that babies who are crying but being held show much lower bodily stress patterns- your hugging really will calm her down, even if she is still screaming. Good luck.
Better go now, thinking of everyone else too, hope you're all coping and managing to practice mindfulness and enjoying the moment, it's so precious. Can;t believe my baby is 6 weeks already! xxx