Will I be convicted? Please help me!!!!?

Please help me I am so scared, I just got fired at my job at subway for theft. Before I was leaving on the 18th, I don't know what came over me but I took three cookies from the drawer. These cookies totaled at $3.00. When I came in today at work I was made to sign the termination form reason being theft. I left crying and apologetic and shook my managers hand, but she didn't say anything about my court date or a fine. I am 18 and I know stealing is so wrong. Please tell me what will happen to me. I offered to pay the three dollars back. How many days should go by before I know that I'm ok?