Hey, I'm 22 and currently in the diagnostic phase for depressions or bipolar disorder. For Chirstmas I'm visiting my parents and they will probably realise that I'm taking meds. They don't know anything about how I'm feeling atm, but I've got a good relationship with them. I just don't want them to overly care about me as my mom especially almost suffocates me with her need for contact.   
Also my older Sister has some psychological problems (anxiety and some other stuff) and I know this hit my parents pretty hard. I just don't want them to think they're bad parents as this really isn't the case.  
Should I tell them if they ask why I'm taking meds and if yes how do I make sure they accept that it's something I want to deal with by myself?

Sorry for my bad english.