Autism and the non believers

sigh... she came up to me with the tap to talk program and her pecs explaining how someone didn't believe that she had a regression and had become more severe. i dont tell anyone except people i dont know what she has. so i know that she was telling someone all the things i tell her she has well so she has classic autism or kanners with regression seizures mental retardation and plateau with a few other things like slight dyslexia well when she was little she was completely severe then she learned to talk when she was 7 and she talked until last year when she hit the severe regression. so basically you couldn't tell something was wrong with her except if you looked closely because she had much intervention. now they tell her not to talk 5 specialists and a lot of therapists well she hit a regression so she got worse she cant talk in front of people anymore, also she had severe seizures a few month ago that messed up her brain petty badly so that made it harder to function for her. also the plateau they told me is when she cant learn anymore from that point because her brain has had enough. and this is at that point for her right now. yes she can dress herself and use the bathroom herself, but she has S.I.B.  that doesn't mean she is high functioning. yes she can understand many thing and can hear them but it takes her a minute to process it and sometimes she will hear it and look but her brain will just process it in sounds so she will look and hear but may not actually hear the words. other times her brain will say that she doesn't hear it at all. she also has sensory issues when her brain wont filter things so everything comes in at once and sounds are too loud and lights are too bright. she told me with cards that someone told her that because before she talked a lot and did a lot of stuff so this was just emotional but that is wrong because she has had this all her life. they even tested emotional aspects all of them but they came up as that they didn't affect her. every autistic child is different. even a another person who has an autistic child cant believe that she has what she has.  please comment on this and tell me what you think.