On the 24th i had unprotected sex. on the 25th i bleed a little then stopped, had sex again and got bleeding again. is this my period or what?

Need clinical exam: Unprotected sex besides pregnancy , may result std s or sexually transmitted diseases you need to see your doctors for examination good luck.

Probably not?: It depends on when your last period was and if they are regular. Do you use birth control? (i assume not). Did you use a condom? You should go see your doctor for std screening. Also if within 72 hours of unprotected sex you can take the morning after pill. I recommend you do a pregnancy test 28 days from this last episode of bleeding to make sure. Get it checked.