Advice please

I am having slight cramps and a very slight pinching paing on my right side i took an opk and it was neg this morning should i wait and test this afternoon or is that ovulation i was super bloaty yesterday and now very slight not noticable bloating. Also had nausea and headache last night before bed?? Any ideas if its O when shouldni test again?? I am also having more watery cm today and nausea and period like cramps?? Should i test again i BDed yesterday should i today as well and romorrow? I just dont wanna miss my chance!!!!!!!!!!