How Long Do Withdrawal Symptoms Of Buprenorphine Last?

hi yes my doctor had me on buprenorphine 2 mg tablets for last 2 years 1 a day then 2 a day I just lost my medicade insurance. I have been working on reducing my dosage to quarter of a pill then 4 days ago I took my last quarter pill of 2 mg of the med. I have been having cramps on my hands and feet specially at bed time when I want to go to sleep, haven't slept for almost a week prior to my complete stop of medication. would you please tell me how long I have to struggle with these symptoms.