Period, ovulation, pregnancy! Help

I was 6 weeks and 3 days pregnant when sadly i had a miscarriage which was september 3, 2015 we started having sex right after bleeding stopped every other day. I ended up getting my period October 2, 2015 (my birthday by the way) and it lasted untill monday the 5th. I had sex october 11th twice unprotected once in morning once at night. Sex again friday the 16th a lot! He came inside me at least 7 times. Some charts said i ovulated yesterday ( friday the 16th) some say i ovulated thursday the 15th what is everyones thoughts...do i have a chance at becoming pregnant? Next period is due oct 30 if nothing than im gonna test a week later... Let me know thanks