Im 18 years old, and have had very regular periods for about a year now. My last period started November 13th, I have had unprotected sex (not smart, I know) many times throughout the month using the withdrawl method. Well Period is 2 days late today. My breasts have been sore for about a week, Ive had weird dizzyness, and have been very tired. I have been feeling a little sick if I don't eat sometime for a few hours. I have not taken a hpt yet... when should I take it? And what do you think ym chances of being pregnant are?

Take it first thing in the morning, with first morning urine.

Sounds very likely you could be pregnant, though.

Technically you are not considered late until your period is about a week late. Our bodies are strange and they sometimes throw us off a couple days here and there. But saying that if you have had unprotected sex then there is ALWAYS a chance of being pregnant. I took a hpt when I was only one day late and it showed I was pregnant. Take a test using your first morning urine. If it is negative and your period still doesn't come take another one in a week or two.
Please remember that if you are not ready to be a mom then have safe sex. It is so much easier to carry some condoms in your purse then to be pregnant for 9 months, go through labor and delivery, and then raise a child for the rest of your life.

With what you have described you may very wel be pregnant. I would suggest do a HPT and see your GP.

Then if you are pregnant you will have some decisions to make.

Kepp me posted on how you go - Best of luck.