How long have you been trying? I would start with getting a period tracking app for your phone or computer, to make sure your cycles are regular. If they are, depending on the length, use OPK's (ovulation predictor test kits - can be bought at dollar stores or pharmacies) about 20 days before the expected start of your next period. You should only need about 5-7 per month to see when you get an LH surge. After the test turns positive (same or darker line as the control line), then you will ovulate about 24 hours later, so BD for those next few days. Depending on your age, give it 6 months or so before seeking medical advise about not being able to get pregnant.
Yea thats what i need to start doing but its not that easy
Stop caring and stop trying is what worked for me. It will happen usually when you least expect it.
Quit trying. Dont think about it. Erase oregnancy and babies from thoughts of the near future. Works I promise.