The first thing I would do is see a doctor...they need to check everything out and do some tests. Make sure you are writing everything down...what types of pain you are having, when (date and times), what you are eating and drinking, your sleep patterns, any medications you are taking. If you have this information on hand it will help your doctor out a lot.
Is your vision changing all the time or just when you are having head pain??
Your vision could be decreasing causing headaches or your headaches could cause some pain in your eyes and decreased vision...I am not the MD...but you should get it checked out, you will feel better and be less worried!
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