Oh dear... Yes. Yes, you were very lucky. Those police officers seem like they were really on the ball. Somebody must've given them a good rundown on disability.
How much had you had to drink, exactly? It seems like maybe you had better figure out how much you can drink before you start to lose your ability to make good decisions, and stay below that amount. An NT might simply get giggly and maybe come on to someone they wouldn't normally be attracted to; but if you're autistic and alcohol lowers your inhibitions the exact same amount, you might just be tempted to take off those uncomfortable clothes, like you probably did when you were little.
Take this as a lucky warning about what effect alcohol can have on you. If you have trouble stopping at a certain level, then don't drink alone, and always drink with a friend who knows what your limit is and can put away the beer (or whatever) before you drink enough that taking off your clothes seems like a good idea.
BTW: Regarding weed. You should know that most police absolutely overreact to your smoking weed. I'm not going to preach at you for it, because as far as drugs go it's pretty harmless, but you have to remember that a drug conviction on your record can really, really ruin your life. I highly recommend not smoking weed until your area has made it legal, or at least reduced possession of small amounts to a misdemeanor or civil offense.