Nausea, cramps, bloating, having had my period since the middle of october, but having light bleeding, but negative pregnancy test.?

Irregular periods : Irregular periods are very common and not difficult to fix. You will need to schedule a visit with your doctor to discuss options for cycle regulation. You do not need to live with cycles like this.

No period since Oct?: That means you missed november. When was your last period, actually? When did you test relative to having missed a period? If it was less than two weeks, retest, since your symptoms are consistent with pregnancy.