Horrible Taste in Mouth

I've recently for half a month now, I've been having this horrible taste in my mouth. I brush my teeth every day and night and sometimes in between meals like around lunch time if I'm home at the time. I use mouthwash before and after those times also. It tastes sort of like the bad breath flavor you get in the morning , (sorry if that sounds gross, then again this IS Glow, we talk about it all, here.) I heard that when you need to get your wisdom teeth out, it sometimes gets infected, and that can cause a terrible taste in mouth. Or a sign of early pregnancy but I have had my period already (although) it only lasted 2-3 days.. and I have been feeling nauseous lately but that could be anything. Any thoughts as to what it could be? Thanks! All answers are welcome