Lh/hcg

So I have hypothyroid. I had a miscarriage October 2021 and have been Ttc since. My meds are good and levels are good per doc to Ttc. My last 3 months my cycles have been 30 days. I’m learning I have been missing my ovulation as we bd when it’s high and not really peak . So this cycle I started testing cd 9 assuming I would ovulate cd 15/16/17 ish. My tests compared to last month seemed darker but I posted and everyone just said I didn’t reach my peak yet which isn’t normal for me. I had EWCM cd 15 and I assumed I was going to ovulate 16. But kept testing bc my tests weren’t that great. They all stayed relatively darker then normal so I kept testing assuming I was going to ovulate late or not this month. I took ovulation test cd10 and it was peak. So I assumed I ovulated yesterday. Was a little crampy. I had headaches cd 16/17 and bloated. Assumed I ovulated but now since I got peak fertility cd 20 I thought I ovulated yesterday. Mind you I have been taking digital clear blue but not at the same time and with the adapter from last month idk why. I had 6 days of high fertility then peak cd 20. So when I was pregnant in October I was taking ovulation test/hcg to make sure my levels were going down after miscarriage so I do know ovulation gesys can detect hcg. So woke up this am. Took 2 ovulation tests still super dark and a pregnancy test , came back from the gym and it’s a faint positive. Is it because lh still in my system or did I ovulate earlier then I thought . Pics below. BD CD 12 16 and 21. When did I possibly ovulate.