Hey there! Just to let you know, I used Google Translate for your post. I hope I got an accurate translation.
I have had the same issue for some months now. The best thing you can do for now and make sure that you don't require any surgery is to visit an orthopedic, and then get the ok to start doing physiotherapies. In my case, I had to strictly do NOTHING during the physiotherapies. No strength training, no cardio. After that, your physiotherapist will give you the ok to gradually get back to training, and if it's a positive answer they will also tell you which exercises to avoid.
Trust me when I say the following, don't rush into doing stuff on your own, because it will make things worse.