Mild cramps

So i used preseed twice yesterday at 11oclock pm and the day before that as well. I received a positive opk 3 days ago. I been experiencing very mild cramps menstrual like crampings since yesterday afternoon. Is this normal? Not sure if its because it worked assisting me to conceive? Or maybe its menstrual cramping i am currently on cycle day 16. Or could it possibly be ovulation pains? Not sure if ovulation pains is similar to mild crampings. We been ttc for 4 months this will be the 5th month and we used preseed for the first time! Praying 🙏🏽🥰 please send me lots of babydust