Ok so I had unprotected sex about 2 weeks ago and I started my period 6 days later but it was irregular.. it started out heavy then it went to really light, then spotting in the matter of 2 days. Which is not normal for me. I always have normal flow periods that last for 5 days. I am also showing signs of pregnancy including tiredness, sickness(without puking), and I am not wanting to eat the foods that I use to like.. they just aren't appealing to me anymore. So is it possible for me to still be pregnant even though I did have an irregular period?

It's always possible. Unfortunately you are now playing the waiting game. You should wait to see if your next period comes. If not, take a HPT using first morning urine.