TTC for 1.5 years

My husband and I have been TTC for 1.5. He has had his semen tested which was normal. I’ve had ultrasounds, bloodwork, an HSG, and follicle studies-all normal. I’ve been seeing a fertility specialist who specializes in naprotechnology aka natural family planning. Has anyone had success with this? I think my issue is that I don’t produce a lot of cervical mucous during ovulation which is essential for the sperm to reach the egg. I started on femara to give my ovaries a “jump start” and will be starting amoxicillin during my ovulation window- I guess it helps with cervical mucous. I’ve already tried mucinex, vitamin B6, and mucomyst. Anybody out there that has been in a similar situation? I’m starting to loose hope. It feels like everyone around me is getting pregnant so easily.