Anyone else get multiple LH surges?

DL 👩🏻👨🏽‍🦱💉🌈💙

I am preparing for an <a href="https://glowing.com/glow-fertility-program">IUI</a> cycle and trying to understand my bbt patterns and OPKs. The last cycle and this cycle it appears I have an LH sure without ovulation then later a second or maybe third surge with ovulation (if that makes sense). Anyone else experience this?

I have done all the blood work and HSG and have normal results. My cycle ranges from 26-30 days. No diagnosed fertility issues. We are using <a href="https://glowing.com/glow-fertility-program">IUI</a> strictly bc we have to use donor sperm. So my only concern is the timing of ovulation and the <a href="https://glowing.com/glow-fertility-program">IUI</a> procedure.

The first picture is my bbt from last cycle. I think I missed the second surge with the OPK but ovulated CD 19. Or did I ovulate earlier on CD 13???

This cycle I got a very brief positive OPK on CD 11 but my temps clearly don’t indicate ovulation so I expect another LH surge. Also, no EWCM. Today the OPKs are getting slightly darker again.

Anyone else have cycles like this?? Any advice on how to catch the accurate surge?