Pregnancy weight

Hi all.

This is my first pregnancy and its a really special one as its a fourth time ivf. I'm 28 weeks tomorrow. Although I am not that worried about gaining too much weight (or so I thought) I've put on 25 pound already. I was a regular gym goer before and I haven't been able to go as I was advised against, but I have been walking as much as possible. I've been eating healthily but not denying myself treats within reason, as I keep getting told to enjoy it, but why am I worrying about how much I've gained!! Does anyone else feel like this??x