Newbie needs help!

My boyfriend and I have been trying to conceive for quite some time now. We started having intercourse every weekend since the 11th of June. My period came on the 15th of June and lasted till the 21st. My ovulation calender says I most likely ovulated the 27th of June till July 1st. The last time we had sex was on the 9th this month and my period was due today and no sign yet, but it's also onlyrics 6:09am, before my miscarriage in January my period were irregular but since they've been regular or 2 days early. I had cramping on my lower left side about 2-3 days ago, I had morning sickness once on the 9th after we had intercourse. I took a pregnancy test on the 2nd and it was a BFN and again on the 9the and once again a BFN. We're really trying to conceive! Help!