Idk what to think..

So this last week should be my ovulating week (says glow). Early this morning, I woke up sweating and just extremely hot and nauseous. I ended up getting sick and had excruciating heartburn in my throat. I woke up this morning and I felt fine all day. But I took a hour and a half nap and woke up extremely nauseous again. But didn't get sick. The last 2 weeks, my breasts have been very sore and itchy on the sides by the armpit area. My period last month was pretty abnormal and all the tests I took said I wasn't pregnant. I even took a digital test last week and it said not pregnant.

What could be going on with me?