Thanks @kmakm and @kezmusc I will book in with the counselor. It just doesn't feel like there's a specific reason for all this bawling. Today I nearly lost it because the receptionist at radiotherapy told me they were running 40 minutes behind schedule!
I already went through menopause long before the cancer, starting at the tender age of 37, or possibly earlier (I didnt realise anything was happening til I came off the pill). As soon as I got my cancer pathology I stopped taking the pill (I'd gone back on it as a form of HRT) but obviously I was still making just enough oestrogen to coast along with. I thought I had got lucky and was feeling pretty smug because they measured my FSH before I started chemo and it turned out I am now in full menopause (at 42!). Didn't realise the AI drugs can send you back in for a second go-around!
I had to stop taking my antidepressant because a major side-effect was sweating and I couldn't cope with it - the chemo was making me sweaty enough already (or who knows, in hindsight, maybe it was just the lack of oestrogen).
What sad pills are you on @kmakm ? I may need to revisit that option.