Assuming you have no tolerance, and it sounds like this is your first time, the lortab (hydrocodone) should make you feel pretty decent, especially with a 20mg dose. I'm not so sure the Valium dose will do much, that is a rather small dose, but it might. You should feel a bit relaxed from the Atvian.
I will point out you probably could have found proper dosages through either erowid or google for this though.