Strange bumps?!

have these red bumps all over my hips, butt cheeks, and boobs. I don’t know if its sweat bumps, some sort of std although I’ve been with the same guy and I know 100% he hasn’t cheated. They are also on my pubic area. I do sweat ALOT. but I’m jot sure what sweat bumps look like due to never being this big in my life. I’ve gained an unhealthy 50 pounds. I’ve never had these things before I used to be 150 to almost 200 pounds. 38DDD to a 40DDD. Here’s some pictures of what they look like on my sides.

Hips^^

BCheek

Underboob^^^^