TamT you dont say an awful lot in your profile to go on, age etc but from what i understand autism comes in different levels and the main give away is that those with Autismp initially have difficult ies with interacting with people and fully understanding and comprehending what is being said to them. I think before you go and spend vast sums of money on therapists, you should ask yourself some questions
1) What is making me dress in womens clothes
2) Do i have an irresistable desire to dress all of the time
3) Do I want to go full time en femme
4) Do you feel lost when not dressed
and so ,forth
The thing is i have found out from the medical ,profession that for one to dress whether all of the time ,or some of the time does not mean thet "there is something wrong with me" the fact is that the desire to dress for some and not others happens because something goes wrong before we are born and thus we end up lesbian, gay and everything else in between.
For some especially adolescents and such like it can be a passing phase which grows out as one matures but for the most part the need/desire to dress goes right back to early childhood coupled with (for some) some feminine traits, sitting down and so forth
Have a good think about yourself, think of all ,the things that motivate you to dress. I am a great believer of trying to sort out things first before shouting "help",
