I am 21 Years old my last cycle was October 28th I was suppose to start on November 25th and I didn't now here it is December and I still haven't started and I been having sex at times I feel like am pregnant but than when I take a pregnancy test it come back negative am I taking them to early or what do I need to do

Your definitely pregnant. You don't need a pregnancy test to tell that. Life as a party girl with not much responsibility has just ended for you. Just think about it. You should start panicking and get depressed.

Do you normally have regular cycles? If you haven't taken a test recently, try another one, making sure to follow the directions carefully. Another option would be to just go see your doctor and have a test done there. Periods can be off now and then, you may even skip one for no apparent reason, but pregnancy needs to be either confirmed or ruled out.

Since you are having sex, be sure to use appropriate birth control if you are wanting to lessen the chance of pregnancy. Trying to become pregnant or not, (obviously not all pregnancies are planned) it would be wise to be taking a multivitamin with at least 400 mcg of folic acid or be sure to include foods/drinks that are fortified with folic acid. This can help to prevent some types of birth defects that occur in the early weeks of pregnancy should pregnancy occur.