im a 21 female,that has not had intercourse however has come into contact with my boyfriend without taking him in. he never came anywhere near me but i worry about pre ejaculatory fluids which i hear contain sperm. this was on the last day of my period. i had a little spotting 2 days later and some period like cramps right before and again for a few days recently. it has been approximately a week since, i know its ridiculously early but could these be signs of pregnancy?