Advice please!

Hey, ladies. I started a new birth control in November, so it's been well over the 3 month period where side effects are SUPPOSED to happen. However, I have gained a little bit of weight (like 10 pounds or so), and my face is constantly broke out. I'm not fat, I've just noticed that I'm not as confident as I used to be. I've also always had clean skin and having this acne just makes me feel gross. My doctor gave me clindamycin for the acne, but it's not really doing anything. Does anyone have any suggestions of what I could do to get back to my normal weight and control the acne? Any advice would be greatly appreciated!