What is the best thing to do to get rid of poison oak, and do cold showers really help poison oak? i got poison oak while bucking hay a few days ago.

Depends on severity: Allergic contact dermatitis from "rhus" includes poison ivy, poison oak, etc. The acute treatment if severe may require oral steroids. If the skin rash is rather limited, topical steroids ointments may help. A thorough laundering and cleaning of clothes and anything else that may have come into contact is necessary. A cool shower may feel better, but removal of the plant resin is best.