Gained 5 pounds in a week?!

I’m 38+4 and I started my pregnancy at 113 lbs, and last week I was 138 lbs. today at my appointment, I was 143 pounds. I’m not sure how but I didn’t eat before my appointment and I haven’t been eating more in the last week, if anything I’ve eaten less. I also have good blood pressure, no GD, etc. is this normal?? I’m super worried and I didn’t ask my doctor because I only see the results of everything online, not at the appointment. thank you