Weight gain 😬

I know you are supposed to gain weight while pregnant but its giving me soooo much anxiety. I had went from 200 lbs down to 136 and now I'm back up to 156 at 24weeks. Im so scared im not going to stop gaining weight and its just taking a toll on me emotionally. I already make sure I'm active an hour a day (10,000 steps per day is my goal) and I dont eat super unhealthy so I dont understand why I'm gaining so much 😭 I'm of course going to talk to my OB at my next appt to help ease my mind but this is my 3rd baby and its been by far the hardest on me..