They also had me sign so they could take my picture. Should I be worried?
Criminal Defense Attorney
If you are asking if there will be criminal charges filed against you, I would have to say that I would doubt it. Usually, these theft offenses under a particular dollar amount are handled informally. This is to say that the store does nto contact police (as you seem to indicate that they did not in your case) and does not request further prosecution being satisfied with dealing with you informally (meaning documenting the incident for their own records and escorting you out of the store).
Good luck, please learn from this and don't expose yourself or your family to this stress...