Can't shake the feeling..

For the past 3 days I have been having this queasy feeling in my stomach. I know I can't be preggo because today is the 1st day of my fertile window according to Glow but it is my 4 day according to Ovia. I started taking Geritol and 800mg folic acid at the beginning of AF. AF arrived June 4th. I have always had irregular periods. Could I have ovulated early? Or is this a normal feeling? Please help me ladies, I'm so confused to the point it's stressing me out...