My last period was on feb 22 2012. I haven't not even spotted or had my period yet.and I took many pregnacies tests and they all come out negative.

Can I be pegnant?

There is a possibility you could be. Wait until you miss a 2nd period and see. Have you been stressed about anything lately? Sometimes stress can make an absent period. How many pregnancy tests have you taken? Do 2 just in case the first one is faulty. Also if your really worried see a doctor as they can do a test that is more accurate then a pregnancy test!