Firstly massive hugs BG. You've been through a lot this year!

Secondly your dd is 4.5 right? My dd sudden became so emotional at 4.5 and I thought it was because I had severe ms and couldn't really play, but then chatting to my mothers group it seems a normal phase.

Dd suddenly started crying over random things: her brothers balloon popped and she cried for him (even though he was fine). She would scream about getting her own way when before we could always talk things through. She started running off and slamming doors when upset. You get the picture.

Anyway fast forward to now and she is almost five and she is back to being delightful, easy going and able to control her emotions again.

I definitely think my pg exacerbated issues, and I am sure your mums condition has impacted your dd, but I wanted to reassure you it is a normal phase at this age too.