Weight gain

When my boyfriend and I started dating 9 1/2 months ago I weighed 125 lbs. I weigh myself every weekend and I noticed I was very slowly gaining weight. So for a while I was told it was “happy weight” and I seriously thought it was. Our relationship is absolutely wonderful! About 2 weeks ago I was 144 lbs, and 6 days ago I weighed myself and I was 147 lbs. I weighed myself last night and the scale said I was 150.7 lbs.... I notice physical changes of myself before others because it’s MY body, but now others are seeing it too.. oh, and I weighed 155.6 lbs the day I had my daughter almost 3 years ago. I’m obviously not the same size wise in the belly but it’s so noticeable to me and I can feel my depression starting to focus. I’m not sure how to feel right now. We took a picture last night at a concert and I have never hated a picture so much in my life. I wanted to throw my boyfriends phone at the wall. i have never been uncomfortable in my own skin but it’s so bad right now. I’m just so confused on what’s going on with my body. I haven’t changed anything in my diet, I exercise regularly. I’m just so emotional about it because I have never had this problem.

I don’t even know what category to put this under.