Driving myself insane!!!!

Alright, so, for the last 2 weeks (the week and a half) I have been experiencing strange symptoms. I had my period on the 14th, as scheduled. (very regular) I have had a little nausea, heartburn nearly every day, I started feeling dizzy this weekend. I am tired all the time even though my sleep schedule hasn't changed. I'm breaking out. And the most confusing one, my sense of smell has heightened. I have been ttc for about 8 months. I took a test the morning my period started (it usually starts early morning but this month didn't start til early afternoon. My periods are normally mid range on day one, super heavy days 2 and 3 and light for the rest. this one was light except heavier on day 2.) all tests I have taken for the last year have been negative. I am driving myself insane. Is it possible that I am pregnant? Or, am I possibly over exxagurating my symptoms? Am I crazy?