I think a opticians opinion is probably best. :smile:
However the following can cause temporary blurred vision and or headaches...
Alcohol consumption
Lack of sleep
Not taking a "time out" from computer or TV screens (Eye strain)
Many types of medication
High blood pressure (Caused by something temporary like stress)
Bad diet, Not eating enough food / Eating far too much sugar
Dehydration
There are other causes but its best to see an opticians, and if need be a doctor. I had headaches that lasted 4 weeks at a time caused by high blood pressure. Ironically

laugh

my headaches caused me to tense up causing more high blood pressure and headaches. A short course a tablets broke the cycle for me and glasses help me from getting the headaches in the first place.
Good luck and hope you feel better soon!