Been looking up on the net, but still have lots of questions...

My first day of my last erratic period was jan. 2 2006. I had sex for the first time ever on jan. 7th and than on the 8th.

Than I had sex yesterday on the 14th. Searching the net tells me that this is probably in my more fertile time about 4 days before ovulation. Since than I have felt full in the lower pelvic region and I have had to go the bathroom more frequently. Should or could I be feeling these typical pregnancy symptoms so soon?

We did us condoms, but I am not on the pill. As I was putting a condom on, I started putting it on upside down so it would not roll down well, so I took it off and flipped it over. Than a few minutes later he came inside me. As I was reading through some of the replys, I have come to an understanding that pre-ejaculation serum has sperm... Could my flipping the condom over before he came cause me to become pregnant?