Help/tell me I'm not crazy (longish post)

I'm into my 2nd month off of Mirena (had it removed 4/22). Was tracking with opk, had 6 high days but no peak. Glow predicted AF to visit yesterday, but nothing. Past week and a half I've had some PMS symptoms (couldn't stop eating, back ache, headaches, slightly sore boobs, but no cramping). Taken a few pregnancy tests (as recently as yesterday), but all negative. This morning just for poops and giggles I took an opk and it was high.

Could my cycle be shorter than I thought and I just skipped a period? Am I thinking too much about symptoms and they're manifesting themselves? I've been on some sort of birth control for 16 years and used to have really bad cramping and heavy periods, so idk what to expect now, really. Am I crazy?