mornin Jamie,
Pre cum or pre seminal fluid versus pregnancy is a big debate around here at times. Many think that you can get pregnant by pre cum alone, while others strongly disagree. I myself am on the fence with that one. You say you were "fooling around".....what do you mean by that? Was his penis in direct contact with your vaginal area? Did he actually penetrate you but did not cum? If he was just rubbing around and dripped some fluid someplace other than that area, i wouldn't worry, but if he was inside of you and got excited enough to pre cum, maybe there is a chance for pregnancy.
The best thing for you to do right now is to relax and wait it out. If you miss your period, take a pregnancy test, but i doubt that you are pregnant. That's just my own opinion as i am sure others will disagree.
And Jaime, the spotting and cramping do happen to some women after losing virginity because some have stronger hymens that need few days to heal up after have been broken. The sex was protected, so keep using some form of birth control. There is even a chance that your period might be late because you will stress over this (I know, I tend to myself and it just adds up more trouble).