Hello, my girlfriend started having sex a couple weeks ago. We would always do it right before her period, and we would always do it after oral sex. We're not experts, so we just wanted to try out what would happen if i stuck it in her for a bit, only for like 10 seconds. I heard that after oral sex, the saliva is supposed to kill all or atleast most of the sperm still on your penis, and I know about pre-cum, so I made sure my penis was very very dry before I stuck it in. A couple days later, she got her period, and then a month later, we did it again, and I went through the same process. Now, she's atleast a week late on her period, and I'm getting very nervous if she really is pregnant or not. She's always had back aches before we started having sex, her vaginal discharge is still the same, there is no change in her appetite or dieting, and she just starts to cramp. Plus, she's just had her finals, so there's a lot of stress there, on top of worrying if she's pregnant or not. We're going to take a pregnancy test in the next couple of days if she doesn't get her period soon. Now, my question is, Is she pregnant or is she just having an irregular period time? She said that last year at this same time of the year, she would always be somewhat late on her period. So is she pregnant or is she just getting ready for another period?