FBI Sting Questioned And Let Go Should I Be Worried

First time ever going to a escort and the FBI came in barging in while hotel. I was talking to the girl,I had given her the money already, they cuffed me and background check me, coming clean they took cuffs off and questioned me why i was there and where i saw her at and then if i had seen a guy there with them. About a hour later the head of the FBI operation came out after questioning them i believe and told me told me that i was free to go and to get into my car and go and hopefully this was a lesson i learned. Should I be worried?