Mirena removal - what is going on?!

I had my Mirena removed on April 22nd. We want another child and figured we’d give it a go and hopefully get pregnant in the next few months. When I got my Mirena our my doctor said my period would start within a week or so. I’ve had a mirena removed before and my period started within a few days of removal. It’s been 15 days and still no period. I figured my cycles would be off but not this off. I’m 3 days late for my period. We had unprotected sex before and after the removal. I’ve been having some symptoms that could either be from the removal or pregnancy (nausea in middle of night/morning, starving, exhausted, extremely sore boobs, extremely moody, I’ve also had mild back pain but doesn’t really feel like my normal cramps). I don’t think I’m pregnant but took a test to be sure, and it’s negative as expected. I’ve heard of of Mirena Crash and I’m not sure if this is what I’m experiencing after two weeks? Anyone experience this after IUD removal?