Is This Unusual?

Well, if there is a possibility of pregnancy, it would be important for you to know so you can make some decisions about prenatal care, etc., and it would make sense for you to obtain and use test kit, which in the US can be obtained at either the drugstore or grocery for about $15.00.  They are quite accurate as soon as 5 days after conception, and worth the investment to provide you with an answer.

If I understand you right, you have not had a period since December, and usually your periods are regular.  While there could be other reasons, it would appear to make sense to eliminate the most obvious possibility first, and then if you are not pregnant, you can visit your doctor to determine other possible causes.

Take the test.  Yes, there are other reasons, but you'd want to know about them too.  Take the test.

You sound as though you may doubt the words that you speak. Most women know when they are pregnant and you also seem to know that you are not. It is always better to be sure than to just guess. I was a mechanic 20+ years ago and always used to say "test, don't guess". Sounds like the same saying is applicable here. I would recommend seeing your OBGYN in case there is something else that may need attention and before things get worse instead of better.

Ok, so I took the test about 4 days ago and it was negative but i still haven't gotten my period so I think going the doctor is for the best....but honestly idk...i mean things happen. Like for example..my cousin was on birth control..and i mean the shot that lasts for 3 months..and she got pregnant....i can't say if i know that I'm not...i wont know really until i go to the doctor..she said that maybe i didn't have enough hormones in my body or something like that..i hope shes wrong..honestly i hope its just from stress or something!!!