Need Help

I don't believe I am pregnant, though I don't want to assume wrongly only to have my heart ripped out of my chest to find out that I am (to be blunt, and we all know it must feel like that when you're not expecting)..

Anyway - I am supposed to be getting my period this week. I have had the usual symptoms of pms - bloating, gassy.. That's all really. Sometimes I get sick, sometimes I don't.

Well, I had unprotected sex (yes, yes. No need to scold me, i've heard it already) on the 28th and 30th of july. Both times, he never got all the way in (just the head), he was never in for more than 10 - 30 seconds and he never came (i know pre-cum exists and all that).

Also, I ended up having protected sex (i was smart this time!) on the 5th and 6th of july. On the 5th he never went in all the way and he came outside of me. On the 6th, he finally got in all the way, and once again, the condom didn't break and he pulled out before he came.

Emotionally - I am not ready for this. I never wanted to have sex until I was married (excuse my story, but I feel it's necessary for explaining the rest) and I went back on my promise to myself, my family and god. It makes me feel sick to my stomach when I think about it (literally) but once I am able to keep my mind occupied on other things, it goes away.

Anyway, I have been waking up kind of sick to my stomach. I don't feel like throwing up, however. Also, the mornings I wake up feeling like that, it has been because I have been worried and thinking alot the nights before I wake about what would happen if I was to become pregnant (there's a lot of stuff on my mind).

I haven't taken a pregnancy test yet but I am going to be getting one within the next week. I would just like some help, honestly some reassurance, that perhaps my feelings are because of stress and actual pms - not pregnancy.

If I could have several opinions, I would appreciate it.