Okay, here's a lengthy and unsure question for you:

About 7 and a half months ago I underwent a bilateral tubal ligation surgery and so far things have been fine, (things in reference, aside from the broadness of the term, include my period being regular) until four days ago (This would put us eleven days after the first day of my last menstrual period) I started noticing a pink-ish mucusy vaginal discharge that would range from light pink to magenta-ish to sometimes brown-ish red. There hasn't been an "excess" of this stuff, just enough to tint the toilet paper when I whipe, and it doesn't have any odor. I've also noticed headaches and fatigue that may or may not be related. This has been continuous for four days now, today being the lightest shade of pink yet. So my question to you is: what is wrong with me?