Is it possible to miss your period for three months in a row and not get pregnant?

Possible: Of course, if you had unprotected sex, than do a pregnancy test. If not, there are sevral other causes for ammenorhea, including thryoid dysfunctions, nutritional conditions, and even anxiety to name a few...Get checked out by gyn for an eval, good luck.

Yes: You can miss your period because of many other reasons that being pregnant. Your hormones, thyroid or ovaries may be malfunctioning. Check a pregnancy test asap though.