I was stung by a jellyfish in Florida yesterday and am wondering what will happen?

[Claytoncmcm]

Three people including myself were swimming off the beach near Pensacola FL. I was swimming on my back and got the worst of the three stings, stretching from my left arm over my shoulder and back down to my right arm. I immediately became nauseated and upon making it back to the beach began to throw up and nearly passed out. I left before an ambulance was called because I felt better just confused. I have heard that reactions come back a week or so later but am wondering should I be worried after having such an intense reaction?

[purple1234567]

You probably should have had a doctor take a look- have you made sure any tentacles were removed?  If you have any open sores, make sure those stay very clean and you can apply first aid cream to those areas.  You may want to ice the spots if they are painful.  If anything gets worse, go to your doctor right away- if it were me, I'd just set up an appointment to ensure that you have all your bases covered as far as tending to the affected areas.  

[Claytoncmcm]

I made sure there were no tentacles and luckily no open sores and the pain has since gone away. I did some research online and got Vitamin C (450x daily value to help with toxin reduction) calamine lotion and Ibuprofen. It may not have worked but i figured it was also worth a shot to use a peel off mask on my back yesterday in the event there were any stingers I missed. The headaches seem to be going away too.

[purple1234567]

Sounds like things are getting better- that's good news.  Also- make sure you are staying hydrated by drinking plenty of water.  

[AnxiousNoMore]

I would see a doc instead of self medicating. High doses of vitamin C (greater than 2000 milligrams per day for adults) may cause kidney stones, nausea, and diarrhea, so I hope you stopped.