Don't know if I am yet or whom by!

I had unprotected sex wit my new guy on 6/24/2011 and 6/25/2011 then on june 29th i had a heavy blood flow for 1 day then the next day it was just about gone. Then on july 4th i slept with my ex with a condom but it busted, and then slept with my new guy again unprotected on july 6th.i started gettin nausea on the 9th and cramping around july 8th.i dont no if im pregnant yet and if i am when i concieved and whom by! Please help!