Welcome and I am sorry your exchange year is not better. Please be very careful. You are young and I am confident your injury will heal. The question I would ask yourself is this. What is the worst that will happen if you play and injure yourself before you are healed? What is the worst thing that will happen if you don"t play to heal?

A very young man here in the states returned to play too early. His name is Jason Lystedt. He is severely disabled now. So please be very careful, concussion is not well understood in the medical field as many here and the UK know too well.