I agree that you should definitely rewrite it and include something from your app year is always a bonus to show that you have been working on improving yourself as an applicant.
I'm never a big fan of having a personal illness/family illness as a major part of the PS, but it's just my preference. If you have some strong experiences in college that are somehow connected to that illness, it's definitely easier to weave in there. Definitely try a few drafts without and see if you have enough substance from your college experiences to make a compelling narrative as to why you want to be a doc. You can PM it to me and I will review it if you want.