Weight gain at 17weeks

I'm so frustrated. Im not surprised I gained weight in first tri. I get the type of nausea where if my tummy is at all empty it's worse, and exercise guaranteed puking. But for the last 4 weeks I've been trying hard. Not always feeling good but better.

My OB appointment today showed I still gained another 5lbs. That's a total of 15lbs in 17weeks. So discouraged and annoyed. 2nd pregnancy and I'm worried I'll gain more than last time.