Crazy cycle after IUD - what is going on?!

I need some help, I have no idea what is going on, and I’m getting so frustrated. I’m only 31, no diagnosed health issues, got pregnant immediately with #1, now on my 3rd cycle TTC #2.

Timeline:

- Late May: got my Mirena out, had a short period a few days later (2-3 days).

- Late June (28 days later): had a normal cycle

- Late July: predicted AF date came and went, then got my period on July 28th, medium flow that day, light spotting the 29th and 30th (32 day cycle, so a few days “late” but not crazy)

- Today (Aug 5th) was supposed to be CD 9, the day we were going to start trying again for this cycle, but I just got my period again!! What could possibly be going on? Do I restart this as day 1, or is there any other reason for (dark red, definitely more than normal spotting) spotting on CD 9? OPKs are negative, but I did have some EWCM.

Any help would be much appreciated, also not sure if my obgyn or an RE would help but I am going crazy not knowing what cycle I am so I can track/plan!