Ovulation help

I know you guys don’t know my body but maybe you can give some insight. My cycles are weird the past few months. I had a period the 5th of this month. I used to ovulated around cycle day 17-19 but now the past few months I’m not sure it must be whenever cause my cycles are short. I wanted to go to my OB but I was gonna wait one more cycle. I started using OPKs this month and for some reason Sunday I got a very dark opk but not positive I kept testing till today but instead of getting darker I got lighter OPKs!!!!!!! Like super negative. I had some intense cramping Saturday to the point I needed pain meds. Did I miss my window and ovulate early you think!?!?!