Pregnancy weight gain worries

So... I was coming back into the apartment building with my s/o and I stopped to fix my clothes in the window by our elevator and as my s/o got into the elevator he made a sly remark about me "kissing my shape goodbye".

It didn't bother me at first but as I go along I find I've been over obsessing about my weight and body. I haven't gained anything really, if anything I've been losing due to morning sickness, food aversions and a sharp decline in my appetite due to some recent tragedy and as a result low mood.

(I already suffer from anxiety and depression amount other things, though I'm managing a little better now that it's getting warmer. When I found out I was pregnant I chose to stop taking my medication for fear of adverse effects to my little Button. I talked about it with my doctor.)

I feel like I'm going to drive myself crazy micromanaging calories, making sure I'm not eating into cravings, exercising as much as I can safely... Help? Advice?