Week gain eek

Sara • Identical TWINS? what? How'd that happen?
I jumped 11lbs from 16-19 weeks. Before I was gaining 1lb a week. Our goal is 40-50lb max gain and I'm halfway at 24 so I guess it's not tragic. My eating isnt super healthy but not bad and I exercise (yoga, weights, walking) 5-6x a week. I'm terrified about going to doctor tomorrow. My husband keeps reminding me that everything we've read says 2nd trimester is weight gain time. I just don't want diabetes or feel like I need to diet the rest of the pregnancy. Anyone ahead of me with some calming advice?!?