I'm working as an apprentice for a software company based in germany. I am working full time.
For about a year now, I've got some kind of recurring medical condition that renders me unable to work for about 2-3 days every month. I have talked to various doctors and it is still not clear, what causes the symptoms I'm enduring.
Everytime I get sick, I send in a doctors note (which does only state the duration of the sickness, no reasons), so I'm in the clear, legally speaking.
What I want to avoid is being seen as a lazy person, who only pretends to be ill. This is not the case. The last time I spoke to someone from HR (about 8 months ago), she showed disbelief in my health history, because appereantly you have to be sick for longer periods ("If you are really sick, you wouldn't be sick for only two days at a time"). Nobody has mentioned anything about my sick days since.
Another difficult aspect about this is that in the next 12 months, the company will have to decide if they want to employ me after my apprenticeship has ended. I fear I'm jeopardizing my chances by telling my manager about all of this. I have already worked from home a little when I was sick, to show good faith, but due to my status as an apprentice and the nature of my work, this is not always possible.
I've got a meeting scheduled with my department manager at the end of the week to discuss my performance and current projects I'm working on.
Should I bring up the condition in this meeting? If I choose to not bring it up, but he does, what do I do? Do I tell my colleagues?