Funky smell

I've been noticing a really bad odor coming from my vigina these last few days. 
It all started on Tuesday. I was at work and noticed a bad smell. I thought it was somebody that might have stepped on dog poop. Then I thought maybe one of my coworkers was just not smelling all thag great that day. But even when i was away from people i kept smelling it. It wasn't until i got home that I noticed it was coming from my vigina. I just got my period on Tuesday but it never smells this bad (not to mention its unusually light. Almost as if it comes back and forth) 
The only things I could think of that might have thrown off my pH balance (which I'm not very educated in) are the fact that I shaved around that area with conditioner on Sunday and later had unprotected sex that night. How can I fix this!? It's really frustrating. Anything helps. Thanks :)