Foul smelling period blood??

Luka
I've noticed that my few last periods (I think 2-3) have been smelling significantly worse that before. My blood has this awfull sour/rotten smell, and not only when its been sitting in the pad for a while. It smells the same way when its freshly wiped. I don't know if it has anything to do with it, but today I've had heart palpitations, diziness, lightheadedness, an intense migraine and chills. Any one have any experience with these symptoms? I have a weird feeling.