I also did not know I was diagnosed with autism until I was 18, I knew I was different but not why. I have never been on medication for autism and I believe that all social and behavioral problems can be improved, fixed, or changed as necessary through knowledge, understanding, and experience (I would also advocate behavioral therapy but I've never had that luxury to vouch for). Personally, I do not recommend medication as it is a temporary fix and a crutch, it may make things easier in the short term, but it does not benefit you, and in many cases it is detrimental to some degree, in the long term. The worst thing anyone can do to someone who is autistic, in my opinion and personal experience, is separate them from everyone else. You can learn and adapt, but not if the opportunity is taken away.