urinary tract infection
"I took this medication for a UTI. Started on a Friday. It's now Monday, and I was told by my gyno office to stop. They told me the side effects I was experiencing were not normal for the medication. Have to head to the hospital to see what's up. Here is what I experienced: 
1. Constant nausea 
2. Headaches
3. Weak muscles and stiff joints
4. Blurry vision. Made it hard to walk up and down stairs, started to gag if I moved too quickly
5. Tired. Oh so tired. 

If it is the medication, then this is awful. The side effects are worse than the UTI. I've never had a problem with any other antibiotic medication."