While I was doing my PhD in my previous position I was diagnosed with a mental illness. I started medication however as a result I could not concentrate very well and it made me quit my previous position. I continued my medication and recently have reduced it. Now I think I am able to concentrate again.
Soon I will have an interview for a new PhD position. I was wondering if I should bring up the matter. On one hand, I think I should be honest to my future supervisor. On the other hand, I don't want to lose the chance by scaring them.
Would you please help me with your opinions?
If I shouldn't bring it up myself, what if they asked me about my previous position? Should I tell everything then?