Weird PMS symptoms

I've had weird symptoms for the past week, symptoms I never have before my period! The only time I can tell when my periods coming is that I start cramping in my legs, abdomen and lower back. I've been experiencing nausea, heartburn, fatigue, tingling in the breast, emotional spells, etc off and ob for the past week. Heartburn and nausea is really setting it off for me because those are things I hardly ever get. My pregnancy tests have been negative and the clearblue ones I took i think shows evap lines so I'm not sure what to think. This will be my 3rd pregnancy. AF is due today and no signs of it showing up. I just need some second opinions. SO told me to wait until tomorrow to test or see if my period comes