Nausea this morning

Georgia
This morning I got up and works out for a half hour, then laid in bed for another hour, then as soon as I got up I had to go sit by the toilet because I really thought I was going to puke. I didn't, but I've had the shakes till now, 3 hours later. I took my last active pill last night, I'll probably start my period in a day or two. Is This a bad sign?