Implantation

I got my peak opk on 3/31 so I'm assuming I would have ovulated 4/1-4/2ish?

Saturday evening I felt slight cramps/pinches on my right side off and on then it stopped. I don't remember feeling anything yesterday & now today I'm experiencing the same thing on my right side.

Could this possibly be implantation or would it have been constant from the first day?