What Causes Blurring Of Vision While Having Headaches?

Hi, may I answer your health queries right now ? Please type your query here...
Hi, my name is devi singh. i am 35 years old. i live in brooklyn, new york. since last year july, i have been getting headaches that is not going away. i feel as though my whole body changes, especially when i get my period. i do have heavy bleeding. when i get the headache my vision gets blurry. i did mri, ct scan, blood and everything came back negative. help me...