I take ovulation tests every day. I haven’t had a positive test in 2 cycles. What is going on?

I have had periods, but my cycle has been irregular. Some cycles are 20 days, some are as long as 45. Sometimes my period is heavy and lasts 7 days, sometimes it’s hardly here for 1. I know irregular periods are common after mirena (had it removed to ttc in August) but I still feel so frustrated. I feel like it will never happen.

Any advice or encouragement is appreciated. I want to give up 😓