Trying to get pregnant..Help please?

Me and my husband have been trying to conceive since i got my mirena taken out feb 27,2010. My periods have been 30 days every month. The last period I had was sept 14th lasted 2-3days(normal) then oct 10,2010 i get this bleeding that lasted a couple of hours and that's it. So i went to the doctor on Oct 19,2010. They said nothing was wrong all my test came back fine pap came back fine. So i told the doctors i would wait till my period was suppose to come on nov 14th and if it didn't i would come back. Well i took opk and they were positive on 21st and 22nd so we bd on 15,16,21,22,23,24....Should i keep bd till i regularly ovulate on the 27,28,29. or if i was going to conceive this month it has already happened because my opk was positive on the 21st and 22nd? please help