i found out i was pregnant by brown spotting... i thought it was strange.. googled it.. found "implantation bleeding"... took the test.. and ta dah.. i was pregnant! Go buy a cheapy test at first and check it out just to make sure you are or arent and wait a few more days! P.S. i am spotting throughout my whole first 2 months so brown spotting is def. a sign of pregnancy!
It could be implantation bleeding, if you've been having unprotected sex, even if the man didn't ejaculate, there's always pre ejaculate which does contain sperm, and there is a chance of pregnancy, wait and see if you are late/miss your period and take a test if you do. Good luck!