Gullible!

Ever since I can remember I’ve always been gullible at school I fell for most pranks and as an adult once I got fired from my job because I kept getting scammed by customers one example is a lady came in and picked up loads of stuff when I was serving her at the end she asked for 2 packets of cigarettes as soon as I gave them to her she said oh no I’ve left my wallet in my car I’ll leave my shopping and come back I believed her waited 15 minutes and then I looked through the bag everything was there but the cigarettes she scammed me I’d like to say this is the only time something like this has happened to me but it’s one of many is this because I have autism? Or am I just too trusting.