Sex and TTC

Hey ladies.. so me and my boyfriend are both very busy people. I have a daughter at home and he works constantly and is very tired when he comes home from work. I’m TTC and have been trying or just naturally letting it happen for 6 months and still not pregnant. I have the flo and glow period tracker/ovulation tracker and have had sex every ovulation prediction still nothing. We usually have sex I’d say 10 times a month.. do I need to be having more frequent sex? Anyone else having the same issue?