Feeling pulling/full heavy feeling/twinges under belly button

So I really have no idea when I ovulated I have three different period apps saying different ovulation days but almost the same fertile days so hard to say how many DPO. Now I have however been feeling like pulling,sensitive,twinges,sharp pinches,like full or heavy sensation under my belly button so I guess in my pelvic region I'm really doubtful it's any type of period symptoms cause it's too soon I mean I started feeling it 2 to 3 days after intercourse but now seems to be like persistent. And of course I had to google the Symptoms and all mostly said etopic pregnancy or ovarian cancer. Since we are Ttc after my MC last year I can say I haven't felt this at all I usually just finish my ovulation cramp a lil and eat for my period like usual so I'm confused and kinda scared 

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