Any chance I'm pregnant?

Update: I still haven't got my period and I'm freaking out. I also have been noticing a metal taste in my mouth that my mom thinks is just from stress. 
I don't know why I do this to myself but every month I find a way to convince myself I'm pregnant, even though I've never had sexual intercourse. My boyfriend and I have been together for 3 months now and want to wait till marriage to have sex. But we obviously still want to please each other. The only thing we've ever done is with clothes on, but one time he went inside me with his boxers and shorts on. Nothing happened, he didn't ejaculate or anything, but then I start freaking out and thinking I have pregnant symptoms. I also suffer from anxiety and it sucks but I can't get the thought out of my head. I'm 22 years old and a senior in college so I'm pretty stressed, but I think I have a problem. I'm going to get on birth control soon, but I just need my period to start. Is there any chance I'm pregnant?