Early recovery is very emotional, since you're not medicating away your feelings with alcohol and drugs. Being really emotional and anxious is also a sign of PAWS: Post Acute Withdrawal Syndrome. The changes in your body and brain after detoxing is over. You are still not in a 'normal' state of mind or body, and it takes time to readjust to living without the substance.
It sounds like you've got a good plan, with meetings and a sponsor. Have you any type of counseling available to you? I see an addiction counselor and find it very helpful to be able to talk over my problems and get her professional feedback.
Welcome to a great place! Glad you joined the family!:ghug3