I had also stopped taking my supplements during that time, such as multi vitamin, fish oil, glucosamine chondroitin
and calcium because I didn't want to carry a bunch of pills around for 2 weeks. When I returned from vacation, I started back up on the supplements. 4-5 days later, I started experiencing those wierd symptoms of blurred vision, eye & head pressure, being tired, etc. I just looked at the multi vitamin and it has iron in it of 18 mg.