VSS extreamly bad today for no reason, why?

Its really bad. I'm having trouble seeing things infront of me. My head hurts very bad. Here are something I've changed recently.

1. I changed my shampoo twice

2. I got an acne face cleanser cream instead of normal onces

3. I've started staying up til 6am for like a month

4. I've wore hats everyday

3 sounds obvious but its been a month with little affects. Why would it start now