I'm a Soviet POW who was sent to a concentration camp after surrendering to the Germans during WWII. The camp has now been liberated by the Red Army. What happens to me now?

Soviet PoWs that fell into Anglo-American hands were repatriated after the war in Operation Keelhaul. Stalin had forbidden surrender in 1941's Order No. 270 and famously commented "There are no Soviet prisoners of war, only traitors." So in the immediate aftermath of your 'liberation' you would be screened by the NKVD and, depending on the results, would be either sent back to the front (from the period October 1944 - March 1946 just over 1 million repatriated PoWs were returned to the Red Army) or sent to labour battalions. If you were in any way suspect, if the NKVD suspected you were too tainted by contact with fascists or collaborated, it'd be the gulag for you. After the war former PoWs had a particularly tough time of it finding meaningful employment, as their papers were stamped with their former PoW status. Things got better when Stalin died, but up until 1992 the standard employment questionairre asked "Were you or your relatives in captivity or in occupied territory?" More info: Soviet Veterans of the Second World War: A Popular Movement in an Authoritarian Society, 1941-1991 by Mark Edele, Prisoners of War, Prisoners of Peace: Captivity, Homecoming and Memory in World War II by Barbara Hately-Broad.