pains days after ovulation?

I just had the implanon rod removed about 2 weeks ago, I had a 4 day bleed that started that night, I assumed this was a period but thought it was maybe too soon? I got an app that told me I would ovulate on the 9th May and sure enough had ewcm and cramps so think this could be right. Me and my partner had unprotected sex a few times that week using pull out, I know its not 100% but were very settled so not against pregnancy. Anyway its 4 dpo and I still have cramps, aching vagina, have slept a lot and felt slightly dizzy, I know its way too soon for symptoms though and I can't test for at least 10 days. But could I really have ovulated so soon after my implant removal? Pls advise :/