So ..... I'm just confused!

Leighann • RIP my 👼🏾 03/2010, Mommy to Nova 04/2019 💕 and soon to be mommy of Parker 10/2020 💙!
So, my fertile window ended 3 days ago but my cervix is still low, I had absolutely pain having sex last night, had the WORST cramps on the left side. Idk what's going on!!! Could I be ovulating late? Why was it still low??? Checked today, couldn't feel my cervix, so it's high now. I'm just confused right now.