CD28 really dizzy & nauseous

My DH and I have been ttc for 6 years after depo. I’ve taken a break from doing anything but logging my period and went back to college to finish my degree. Yesterday I was so dizzy in the morning that the room was spinning and I was nauseous. This morning I was dizzy again and thought I would throw up. I’ve called into work thinking that I’m getting the flu, but it mostly subsides after noon. This morning, out of curiosity, I checked to see when my period was due and it is due today! Thoughts? I’m trying not to get my hopes up.