@amyspames I'm so sorry to hear things are bad today.
I will give you some more detail about my experience post-op; I hope this lets you know that you aren't alone in what you are going through.
Physically the first day or so after the op I actually felt great, even though I was bleeding - not enough to get up and run a marathon, but I think I was still on the effects of the anaesthetic. Towards the end of the week though I was feeling so weak, some days I couldn't even manage a walk round the garden. I just tried to listen to my body and do felt right. I also suffered from awful constipation - I felt like it was such a milestone when I had a proper BM! I know you've had further complications/set-backs so be extra gentle with yourself.
I also just ate whatever I wanted in the early days; I took some enjoyment in no longer feeling sick and nauseous and treated myself. Don't be too hard on yourself if you gain a bit of weight as you recover - it's more important to be gentle on your body and do whatever gives you comfort. Where I am now, I've found that incorporating healthier choices and doing some exercise has helped my mental wellbeing, but everyone is different.
Emotionally actually going through the op did give me a lot of relief - my darkest days were the period of waiting after I'd found out and before I could get re-scanned by my EPU. During that time I experienced a similar 'unstability' as you have described. Immediately after I found out I felt very calm and almost relaxed, the worst had happened and I finally knew it was all over. 24-48h after that I felt manic, couldn't bear to be in the house, and was out for 4h walks (my poor husband having to get up at 6am to come out with me!).
Post procedure, I immediately felt great relief, although there was also a huge undercurrent of upset. For me, every day that has passed, I have felt better and better, although I have had slip backs. This morning I was even able to sleep for a bit longer, so I know things are returning to more of an even keel, but naturally everyone's journey is different, will take different paths and varying lengths of time. I would say don't deny yourself expression - if you need to cry or scream do it, lean on those who you are close with and support you.
For me my mantra during this has been 'into each life some rain must fall' - I've tried to count a little blessing each day like the fact that I was able to get pregnant relatively quickly in the first instance, that I feel I'm recovering really well from my procedure, that there is nothing to stop us from trying again as soon as we wish. I find this helpful to think on the positive side and hope for better days ahead.
You will get through this - you just need to find your own way 