Too much muscle?

Alicia • I`m 20 and living life to the fullest
I've been working out a lot lately. Ranging from cardio resistance training and stairs! So I've gotten a lot more muscle and also gained like 5 lbs in the last couple months and I'm only 5ft and weigh around 108. The problem is my jeans don't fit anymore cause i gained too much muscle. Is there any way to slim down fast so I can wear jeans again?!