I walked into a store with bright fluorescent lighting and all of a sudden my legs felt like rubber, I felt dizzy, started to sweat all over and my eyes felt strange. I left and sat quietly for a while and eventually returned to normal. This is similar to what happened a couple of months ago when I took on a cashier job. I started to feel the same symptoms but tried to push through it. I ended up throwing up so this time I knew to sit in a darker and quiet place. Is this a sensitivity to bright lights or is there some other cause. Last time i worried about my heart so I went to the doctor the next day. They checked my heart, blood pressure etc. and all was fine. They thought it sounded like a panic attack. I however was not stressed about walking into a cvs store today so that can't be it.