Pregnant question

I am currently 11 weeks pregnant 1 year out of RNY. My stomach seems to be filling in and I cannot fit my prepregnancy clothing. I haven't gained any weight yet which my dietitian said is good. I know its to early to show so I am thinking possibly water but I am wondering if anyone else notice this? 

bloating is VERY common in first trimester.

your GI tract slows down so you may be retaining gas and poop.  You also retain water.

Your uterus is probably getting up towards the top of the pubic bone now too which will start pushing your other organs out of the way a bit.

basically - this is all totally normal. 

Congrats on the baby!