I haven't had my period in about 2 months. It's always been a little off, no set number of days apart. I tested negative on two home pregnancy tests. Should I be worried?

Call your Dr. to get a blood pregnancy test.

Do you feel pregnant?

Call your doctor. It might be nothing or it might be something. My period is seriously out of whack. I just need to get back on birth control pills so that it regulates my period.

You can still be pregnant. 2 months is quiet long to miss a period. You could just not have enough HCG levels in your urin. Did you take the tests in the morning?
Your missed periods could also happen for a numerous of reasons. Stress, poor diet, illness.
It couls also meen something more serious. Contact your OBGYN and let her know the siduation. She might want you too come in and take a few of HER tests. GOod luck!
(Also you never mentions if you had unprotected sex or not... you can't have a baby without sperm)