Sore boobs

So I have been taking provera and Clomid. If my period is still on track I should have started Saturday and I didn't. My main symptoms lately of starting my period is sore breasts. Well I have sore boobs now but it doesn't feel how they did for starting my period. They feel bigger or swollen or something. I've been getting tired in the afternoon and Thursday Friday Saturday I had a dizzy spell. I seem less hungry but I don't feel as if I am going to be starting my period. I took a pregnancy test last night and it was negative. What do you ladies think....could I be pregnant, starting my period or just having the symptoms and it be nothing?