BDing every other night would be better cause yes it does lower the count. But if you find out when you should ovulate then you can just do that during the time you're ovulating.
Try using ovulation tests the week you think you're supposed to ovulate (14 days before your period should start), or if you have irregular periods you can buy tests cheap online and use them everyday. You're looking for a line that is as dark or darker than the control to show a surge and then 24-48 hours after that you should ovulate. Here's the cheapest tests that I have been able to find online:
http://www.saveontests.com/
To help you figure out ovulation time, you can go here to chart your periods, and it will help you.
http://www.fertilityfriend.com/
Good luck