OVULATION??? Confusing?

Ok so I know I have asked too many crazy stupid questions on here but I feel absolutely clueless. How do I know if I ovulated this month? My first day of my last period was June 19,2009. I have a regular 28-30 day cycle. We have BD on 6/28(tmi but twice), 7/1,7/4,7/6. And Im sure before the 28th but I cant remember (which sounds funny but..). We really want to have a baby. Is there really a chance this month???