I've done something horrible to this girl, and I swear I'm an innocent guy. But I get the cold shoulder from people?

I swear to God I'm an innocent guy with all the intelligence from having 'potential', or at least something my grandma says or my entire family because I have Asperger's syndrome. But my sister joked around with me saying we've had sex, and I believed her. But although, we technically didn't, I feel like she did something illegal towards me. She also has me really confused me about sh*t, I've never done or have felt like I've done everything wrong. My own mother reminds me of how f* cked up I am, which is freaky. I've also gotten confused about how stupid everything is, and I get so paranoid about sh*t. Oh, and get this. My mother flipped out at me because I've secretly messaged this girl on a dating site, and it turns out this girl has been real the whole time I've been sending a bot dirty sh*t. So, should I contact local law enforcement? I would personally have a state trooper knocking at her door if whatever on my and her's snapchat that was not deleted. I would have it deleted. I would also have an FBI agent to record this conversation to prove I'm not a pedophile. I have been to a 302 ward for this and I don't feel like listening to what a Mental HealthCare Worker does or what it's supposed to do because they're retarded....