I've been having congestion for three days after a one time binge drinking night. Could it be alcohol related? I didn't go to the ER till next day.

Regular binging? If you binge on a consistent basis then, you could be a bit immunocompromised which could open you up to simple infections such as upper respiratory or the like. So, from that perspective yes, it's possible. Otherwise, it is likely a coincidence. You should still get it checked out if it's bothering you to make sure it doesn't require antibiotics. Wanna talk more? My Key Code: PDXFNR.