Tylenol 3 will only postpone the detox. They are a lower dose opiate, so I wouldn't take them if you are trying to get clean. The soma's might help a little for some of the aches and pains, but these are addictive also, so be very careful with them. Sorry I am not sure about the Valuim and how long it stays in your system. I'm sure others will reply with answers to that.
somas are not good for oxycontin withdrawals because they do not contain opium. the main thing you could use to break yourself off is some form of loratabs or vicadin to take the edge off. depending how many you take it should for sure be out of your system in three days.