the week before my period I sometimes experience really really intense nausea. Always in the morning & late afternoon. this has started in the past year. I get the rush of fluid, stomach in knots, super uncomfortable but NEVER physically throw up. i feel it getting progressively worse each month. Im starting to wonder if it's more likely a food allergy & I'm experiencing it more often than I think & I just think it's PMS. Maybe it's not associated with my period? Does anyone else experience this as a PMS symptom?Right now it's worse than ever & I want to take a pregnancy test. I'm only 2 days late... not abnormal for me and the nausea isn't anything new but never been this bad. how do I know which it is?