Okay, so here's the deal. I'm 18 years old, my boyfriend is 16. We have oral sex and we touch each other, etc. However, no penetration takes place. I don't take birth control or anything like that. But, I figured it's okay because he only ever cums on my face or on his stomach. I do produce a lot of lubricant and he does make me have orgasms by my clit. I was supposed to start my period on the 22nd (It's the 28th). My breasts felt tender and a bit swollen around the time I was supposed to have my period- which is normal. But, now it's gone. Over the past 2-3 days, I've had very light on and off cramps. And, starting yesterday I had a brown discharge. It looks like what comes the day or two after a period, but I haven't had mine yet. I'm actually worried that I may be pregnant. And, I know it may sound silly. But, I'm just worried and I would like to know what you guys think. Also- he did touch me once a week or so ago when he had cum on his hand. But, it was either dry or wiped off and it was not a lot. If you don't think it's pregnancy, what else do you think the reason could be? 

Thank you in advance.