Lind,
Actually, to the best of my knowledge, the script you received then is in fact Lorcet. Well, that's just a brand name, like the many others of Hydrocodone preps (Vicodin, Norco, Lortab, etc). Of course I don't know, but it's likely you have a generic bottle there anyway (like does it say "10 hydrocodone/650 apap" on it?)
It's just that I was on Lorcet for quite awhile a couple years ago, and that was the 10/650 combo. Vicodin ES (again, just the brand name) is the 7.5/750 combo (also what I, and many others, feel to be the worst Hydro prep to be on if you're taking meds long term, due to the fact that it's the highest amount of Tylenol of all the Hydro preps). And finally, I was only RX'd Vicodin HP once in all of my travails, but I'm pretty sure that prep is 10/500.
Hope that helps you!!