alone.

So I'm a virgin. on October 22nd my man came on my stomach in the shower due to a handjob and it dripped down to my vagina. I found some down by my vagina but it was little white balls. can you get pregnant if your man cums on your stomach in the shower and some drips down to your vagina?? i took a pregnancy test a week after (on that Sunday October 30th) and it was negative. Then on November 2nd i started my period. It was four days early. I don't know why but I'm still freaked out i could be pregnant. I started taking birth control pills exactly two weeks ago, so my hormones have been crazy. Could I still be pregnant? I feel crazy. I don't know why I am still afraid I am.. what is wrong with me! I feel so alone. Why do I think I am?