HI just to ask

my partner and I had it last nov 4 and after that nagbleed ako ng nov 8. I don't know if it is bleeding or my period kasi 7 days din syang tumagal (nov 15 natapos). But I am experiencing back pains now and a lot of burping. Aside from that wala naman na, is there any chance na preggy ako? Thank you sa sasagot.