I'm 28 yrs old, single and no children.
After I have sex with my boyfriend, I suffered abdominal pain. He so aggressive. When I passes urine it's so painful and it is bleeding. I'm so scared!!

Are you using any lubes of some sort,
Is there enough foreplay to get you ready for sex first

And tell him to not be as rough

You may have a urinary tract infection, you may need to visit a doctor.

i suggest you see a doctor... why was he so rough with you? that's not good!

Have you been checked for gonorhea...

Gonorrhea - Symptoms - Treatments - Prevention (http://womenshealth.about.com/cs/gonorrhea1/a/gonorrheasytrtm.htm)

There are several sexually transmitted diseases that can cause painful sex - chlamydia and gonorrhea being two of them. Another common issues is fibroid cysts that can be in the lining of your uterus. Friction against this can be painful and cause bleeding. Either issues requires a trip to your doctor who can accurately diagnose and treat the issue you have.

ANY time you have sex that is painful and/or causes bleeding, you NEED to see your doctor.

I'm not even going to guess as to what the problem MIGHT be.

Go see your doctor. NOW.

ANY time you have sex that is painful and/or causes bleeding, you NEED to see your doctor.

I'm not even going to guess as to what the problem MIGHT be.

Go see your doctor. NOW.I'll second that... you should never experience that sort of thing.

It worries me you used the term aggressive. If you had said we like it rough then that would be fine but aggressive implies anger and that it is one way. Is this the case or am I reading too much into this?
Seeing your doctor is definalty the best thing you can do because there are a number of reasons you could be in pain. Have you had this pain from sex in the past?

Doctor now! Even a minor urinary tract infection can get serious if it reaches your kidneys--treatment is no biggie, just antibiotics.
And get him to take it easy if he's hurting you. Odds are if he cares and loves you (like boyfriends ought to), he'd be horrified by the idea of causing you unnecessary or unwanted pain.