<disclamer: I am not a doctor>
Cut I have bad news for you, ligament, being a dense tissue, take nearly as long as bones to heal properly. The good news is, as long as you don't force yourself too much the pain should diminish or maybe even vanish in a few days. If your planning on doing a lot of activity, though, I'd recommend investing in some form of ridged ankle brace (ACE Bandage makes a decent one that velcro’s on with full lateral support). While I have no idea the types of stores Germany has, you should be able to find the brace at the same location you’d go to have a prescription filled (drug store, pharmacist, Wal-mart).
Was this a trained medical diagnosis? If so the medically trained person looking at it should be able to give you a more accurate and professional prognosis. I'm just defaulting to what I know through 15 year old training and personal experiences.
Phoenix...
"I'm not saying there should be capital punishment for stupidity,
but maybe we should just remove all the safety lables and let nature take it's course"
"A Place For Everything & Nothing In It's Place"