Umm... scared

So I took a few hits of marijuana with my friend at a 12 am and we were high. At 3 am as I was driving home, a car was tailgating me and going crazy by swerving and flashing lights. I took a turn and stopped on the road and called the police for reckless driver. I explained the situation to them and then we both hung up. I driving back to my house and a cop on the other side of the road makes a U-turn and starts following me. The speed limit was 45, I was going exactly 45. The cop was tailgating me obviously trying to tag me. Then he turns on his lights. *shit* I pull over and he comes to the passengers side, I hand him everything he asked for. Told him my friends and I smoked a little bit, and I took about 1 hit. I wasn’t high. Then he takes my license and he asks “do you have a medical marijuana card?” I say “no.” He then says okay and walks to his car and backup comes. This 21 year old looking cute cop 😏 anyways haha, we talk the one cop searches my car while the cute one gives me so influence tests. They both find nothing except a few little stems. I’m good to go. He says “look. Don’t ever smoke in your car or drive high. Go get your medical card if you’re going to smoke and read over the rules” he hands me my license and they watch me drive off. They took down my address and phone number. What’s going to happen next? Anything? I’m terrified! I live in Chandler, Arizona. This happened in Arizona.