They did not have more than 4000 mg of acetametaphin in them, you'll be fine. But don't take hydrocodones, speaking from personal experience, they're a bitch to get off of.

This is straight off erowid..

Oral Vicodin Contents
Hydrocodone Acetaminophen
Vicodin 5 mg 500 mg
Vicodin ES 7.5 mg 750 mg
Vicodin HP 10 mg 660 mg

I know the list is going to get fucked up, but the first number is the amount in mg of hydrocodone in one pill, the second number is the amount of acetaminophen in one pill.. you probably took regular ol 5 mgs so I'd say you ingested about 2500 mg of acet. Like I said, you'll be fine.