Vomiting for 7 hours?

I took 2 mini vicodins last night, naproxen, vitamin b12, and this bladder relaxant medicine for stomach pain when i laugh, and this morning i took 2 percocets at 8 am. A half an hour later i was sweating and felt like i was going to die and threw up and threw up 5 or 6 more times up until 3 pm, also i had shaking, cold and hot flashes, eyes dialated only for the first 30 min. after taking the percocets...i had pizza later at 5 and am perfectly fine now so what could have caused this terrible reaction? btw the percocet was 512- 5mg and i had 2..