10 lbs in 1 month! 😱

Uhhhh....I gained 10 lbs in 1 month 🤯 I am 22 weeks and had a checkup a couple days ago and I almost fell over at the number on the scale, I actually asked the nurse if I could step on the scale again to double check! Should I be concerned? I started my pregnancy around 135 now I am 150 and I am only 5’3”. I have a healthy vegetarian diet...I could eat less fully fat diary....and exercise more....