Implantation bleeding and fear! :(

Please girls, don't tell me I'm stupid! I'm finishing my master degree, I'll be back in my beautiful Sicily in a month. Some weeks ago I went out with a friend of mine who was in my same situation: just split with his girlfriend because she cheated on him at every occasion (like my ex used to do)... well, we talked and drunk, we had sex and started dating.. I should have my period in ten days and this morning I had some bleeding, I'm afraid is implantation. We didn't use any BC method and once we had sex two times in a row without even cleaning anything, and it was during my ovulation. I'm afraid I'm pregnant, I feel strange, my boobs are bigger than they usually are and also he's Persian and wants to go back to Teheran after his grad. Should I talk to him or wait?