Biacin symptoms and conditions

I asked the doc to prescribe me Avelox 400mg because i have had bad side effects from Biaxin and Erythromycin. I get chronic upper respiratory tract infections from allergies etc. I figured my mother took this med with no side effects (and she is usually very sensitive to all meds including vitamins) so perhaps i could take it without side effects. I was wrong. I took my first pill at 2pm and about one hour later i was starting to feel on edge. Its 11pm and my heart is still racing, and my chest feels very strange. These feelings are from the drug, not anything else! The doc and pharmacist do not explain any side effects or concerns. when i took Biaxin i had no idea that this was the cause of panic attacks that i was getting. I thought i was losing it at the time. Tomorrow i will head back to the doc and get this prescription changed hopefully to a 'nice' antibiotic...if there is such a thing.