My period came super early, it was very light and light pink. That was on the 18th of feb. now for the last couple days I have noticed that my favorite things such as my energy drinks (I usually drink EVERYDAY) are making me nausous, as well as certain foods. I am/was a very heavy smoker, but I went out to smoke today and well I got super light headed and dizzy felt like I was going to throw up. What could be wrong with me?

Perhaps the flu? You posted it under pregnancy so you must think you are pregnant.

The issue here is that signs don't normally show up this early.
You did not even say you were sexually active, I will assume that.
And you did no miss a period, merely coming early is normal, women often miss, have early or have late periods.

But in any case, you are going to have to wait two weeks and then do a urine test, using the first urine of the morning.