The only way to test you is if its a condition of your release. I dont think you were ever taken into custody or had to post bail so, no they cant make you. It sounds like your mom might be in on this with the person you talked to. Who was this person? Were you on probation at the time when this happened? If so that changes everything. Remember never admit anything to anybody, period. It sounds like you have an ok relationship with your moms, but she may think shes doing the right thing for you by talking to the popo's. It might be time to cut the strings, not all the way but maybe just keeping her in the dark. I'd keep on getting budded.