Illness, sisters and a social group breakthrough

I have had illnesses in the past which temporarily meant I had to heavily depend on family support, very intensively for about 3 months and then less so for about 6 months after. However I was very determined not to let it affect my career decision and opted to go to a college only 6 months after my bout of illness. However because of the nature of the illness (I lost my sense of communication and lost sense of things around me) my sister was determined to start making up reasons why I shouldn't go to college and one of her main stories/arguments against it was that she had a friend who she started to often talk about who hadn't passed the exams well enough to get into college. As a result, the symptoms of my temporary illness severe communication problems became confused with not being able to complete entry to college properly and not being able to get myself through college. I've had years of these stories, however gradually through doing distance learning I have managed to proove myself in terms of being able to complete assignments.

My breakthrough is this:- I have recently been invited to a friend's hen night (but not the wedding) which I'm absolutely delighted about and this means I will get to meet the main friend in all my sister's stories which she told about this friend not making it through the entry stage to college. I'm so hoping this will mend the situation and somehow enable my sister to either stop commenting on her friend's misfortunes - which will clear up the confusions people have about my successes vs early illnesses symptoms and/or somehow the friend can segegate her misfortunes from other people's temporary communication problems whilst having an illness and their actual ability to complete exams. A lot of my sister's argument against me going to college has been that I won't be able to cope in a social environment with the heavy pressure of exams. Now I actually got through the pre college exams with fairly ok marks - not the best but have tagged on extra distant learning qualifications. Now all I need is a miracle that will change the way my sister thinks about college and me so she stops influencing people - often not deliberately but I can see people sort of classifying me against her. This is unfair since she studied almost 8 years ago now and she's not really up-to-date about how people are tolerate of people with health problems at college. I just hope the hen night's a success and my sister can put her study and her friend's misfortunes behind her and view a college career more postively since it was over 10 years ago now that I had the illness.