Do you?

Do you have sex as many times as possible to your ovulation? And do you not have sex the week before? Just trying to get a general idea because I’m about to give up!!!! I got off of birth control (the pill) about 4 months ago. I figured it would take a while for my hormones to adjust. Even though it was a low hormone pill. Last month my husband was on penicillin for strep and still nope!!! Nothing.... Our first baby came right after I had my iud out. I feel broken :(