I would like to remind you of the fact that if you feel like you are heading the wrong way, you are always allowed to make a U-turn. Don't ride your bicycle where it's not supposed to be going. Nothing good will ever come out of that. Instead, take a look to the left, take a look to the right, ensure you will not put anybody's life in danger and once it's all clear - turn and pedal where your heart wants to go.
So often do we seem to forget, so I just want to remind you; U-turns are allowed.
Lady who bicycles her own way