My question involves criminal law for the state of: Massachusetts

I was caught shoplifting at Walmart the other day. I know it was stupid and i am not trying to make excuses, but i just have a few questions. I am 20 years old. I took 35 dollars worth of make up and was caught by the LP on my way out of the store and was told to come with him to the office. I gave back the make up and was given papers to sign. one of them was a ban from walmart, i was told that i had to sign it. The police showed up and they looked up my record which i don't have. I was then told that i will received papers in the mail from walmart and the local police station. They never told me what i will be charged with. Does anyone know how long i will have to wait to get the letters. And also what should I expect. I plan on getting a lawyer but should i talk to one now or should i wait until the receive the letters in the mail?

Please help me!!!