Hypersexuality in autism

Hi there

I am a bit embarrassed to ask this question/gain advice on this but I have nowhere else to go really. 
I want to know more about hypersexuality in autism. I am having an assessment for autism in November and want to talk to my psychiatrist about this particular issue. 
Again I’m really embarrassed so please bare with me and be kind. I am worried that I am hypersexual along with experiencing various other symptoms of autism, but hypersexuality is a problem for me currently. I’m not sure whether I’m seeking to be sensory soothed or what is going on with this. Excessive masturbation is a problem and I have felt extremely upset because of this issue. Does anyone have any advice on whether this falls into the symptoms of autism? 
I probably should give some background information as well on some of the other symptoms I am experiencing.

Obsessed with numbers I.e I have to count certain things, music has to be on a specific number of loudness, collecting information and things such as coin collecting, repeating the same lyric in a song for weeks/months, feeling overwhelmed very easily, clicking fingers, whistling, hard to know what others are thinking/feeling etc.

Any advice would be HUGELY appreciated.