Question about pregnancy/missed period

Help! I somehow messed up my charting on glow and I'm having some physical signs that I could possibly be pregnant. I should have started my period today (I think?!) I did not sleep much last night and I'm so nervous because it could possibly be my husband or another man I had a thing with. Please don't judge me btw.. I am here for support and I am already beating myself up! 
I have been having some lower abdominal cramping, ovarian pain off and on, feel a bit nauseous (been belching a lot today but keeping food down) and I took a pregnancy test but came back negative. I will retest again in a few days but what do u think??
I want to talk to someone.. My husband eventually but I don't want to be judged. I just want some advice. Thanks!!