Ibuprofen overdose? or something...why do i feel sick?

I am not a doctor, but I know I've been prescribed 800MG before and that is only 200mg more...so I would rule out overdose! BUT, taking a lot of pain relievers over a period of time isn't good for your body, liver in particular. I would say you are just sick...and the Ibuprofen is worn off by now, but again I'm no doctor. I'd call a pharmacist to be certain but I think you'd be fine taking anything by now. With your symptoms I'd take something like for your throat with a pain medication in it too.