Am I likely to be pregnant?

I went to a house party off campus on Friday 13th/April 14th.  I was ridiculously drunk and I hooked up with a guy. We didn't use protection. Now, the problem is that I'm not even entirely sure if we had sex or not as I blacked out from the alcohol. If we did have sex, it would have been my first time.

My concern is that I should be getting my period within the next few days. Usually before I have my period, I have marked symptoms: nausea, fatigue, cramping, and especially tender breasts. I have not felt any of the symptoms that I usually get, however.

I understand that I COULD be pregnant, but is it LIKELY that I'm pregnant? I'm only 18 and I understand that it could be normal to have my menstrual cycle disrupted after having intercourse for the first time and that it's too early to detect pregnancy with a home pregnancy test.  I'm extremely nervous and my stress is at an all time high.

This is making my sick to my stomach. Please, help.

[tschock]

If you're telling the truth about it  "would have been my first time" you would know.
If you woke up and it was very sore down there...perhaps some pink blood as well...then that means that he had his way with you.
You would also have seen a lot of white or clear fluids coming out of you, especially when you went to the washroom the first time. Not to mention the " mess " you would have woke up in.  Of course it would have dried up after several hours, but you would have noticed white flakes on your legs or at least the pubic area.

Anyway...our periods change through out the years...so do our PMS symptoms.
You're probably so upset that you are throwing off your cycle. Stress can do that.
Just relax. Wait for the day your period is due, and then use a home pregnancy test if it doesn't come.
Some of the better ones can be used up to 5 days before your period is due.