Low sex drive

I'm 20 & I live with my boyfriend now & I noticed that my sex drive is lower since I moved in with him. I used to live on the east coast & had a long distance relationship before with him & maybe it was the anticipation that drove my hormones crazy since we'd see each other every month for only two weeks bc id fly out to the west coast and see him. I'm always the horniest one week/days before my period. But when we do have sex I reach my climax way too fast & I hate that bc I want to feel it longer. What can I do? Should I take estrogen to balance things out or what? Help