OPK question

Hello there, my name is Stefanía, My husband and I have been TTC for 2 years the tradition way just haven sex and wait for it, so far we only thought we we're pregnant when I was 2 weeks late but then AF came visiting; anyways,  last week I went to see my OB/GYN and we're going to check hormones levels, OPK to know the best days to do some BD, a sperm count and a HSG for me to find out why I haven't gotten a BFP in 2 long years. That's my short story, my question is, I got the OPK since I'm on my days and first day the result was low fertility, after that 4 days in a row have been high or but not the peak face. Does anyone know what this means? Am I dropping the egg or not? I'm confused cause for what I read I'm supposed to have 2 high and 2 peak days. Help pls