Yes. It's really easy to basically indulge in a bit of prying followed by letting prejudices run free in the preparation of the report. I'm sure that you aren't intending to do that, but we have seen so many studies end up doing exactly that. So, please, think really carefully about how you will avoid prying and prejudice. It might be helpful to start by working out what your assumptions about people with ME/CFS are. If you want, you could write them here - I'm sure members could direct you to resources if some of your ideas are inaccurate.You cannot explore the influence of CFS on the formation of identity because you cannot establish any cause and effect relationship. This is typical bad psychological methodology.
Why are you prying into peoples childhood experiences and family dynamics. That smacks of typical psychological blame attribution - the very last thing people with ME/CFS need. Maybe you are not yet aware that all this family psychology stuff is unfounded speculation and often pernicious and damaging.
Perhaps the important thing would be to understand how the experiences of people with ME/CFS might impact on your own identity construction or growing up? Learning to see bullshit for what it is?
Again, it would be helpful to know what you know about ME/CFS and why you were interested in this topic. Cover letters from researchers who are recruiting sometimes give this information as well as setting out the involvement of the relevant community - it can help potential participants decide if the study is likely to be worthwhile.
You direct participants to the MEA and AfME should they feel 'upset by anything' as a result of their participation in the study. It would probably be a good idea to run your protocol past someone in one of those organisations before you interview people, if you haven't already, to check that what you are going to do isn't likely to cause such upset.