Still A Little Curious...?

Ok so me and my bf use protection during . But sometimes he likes to fool around such as after having he tries to stick his back in or he will rub it within that area but I had noticed one time that there was still sperm coming out of his . I was told that from asking a previous question that it was possible to get pregnant that way. Lately I have been having since sunday cramps I figured maybe my period was coming early but that was the answer. I also noticed lately that I have been real extra constipated. Anytime I feel like I need to go to the bathroom its hard for me to push it out to the point where hurts and I get a lot of pressure down there and it comes out like little pebbles. I get dizzy sometimes and get small headaches. My bf says I'm getting fat, I figured maybe I'm just bloated. I had my period on dec 6th so I wouldnt have ovulated till the 20th. So what's the lately of me being pregnant now? I will indeed take a test if my period is more then 2 days late.