DRIVING WITH NO INSURANCE

I know driving with no insurance is against the law but I fell on hard times and couldn't afford it...so long story short I rear ended someone but I barely hit there car,I jumped out the car observing what I've done,there car was not damaged at all.i asked the driver was he ok,he said "yes but I need ur insurance" I said "there is no damage to ur car" I took a picture and everything.later tht day I was pulled over by police,the guy called the cops and told thm I hit him an I left the scene (hit & run) tht wasn't the case,so the police asked for my insurance.i told thm I dont have the info on hand the police gave me an email to send my insurance info b4 15days....what can I do????