What are the side effects of stopping methadone?

I am on Methadone for RA and I only take 10 mg 3 times a day plus they have me on 300 mg seroquel for sleeping problems I want to stop the seroquel because I notice that when I take the seroquel it first makes me really out of it but now I am feeling like I can not swollow, I get really scared and I am freaking myself out that is why I want to stop the medication but I am affraid of the withdrawl problems can anyone tell me what they are and if maybe I should not stop all meds at once I really need someone to help answer this I am at a lost of what to do Thank you guys for your time!!! Methadone withdrawal is long and uncomfortable, and I would recommend medical support, you need to tell a doctor and let them help you. I have been on methadone for 5 years, and I have swallowing difficulties too. I've had an EGD, where they look down your throat with a scope. Nothing was wrong, and since I had equal trouble swallowing solid food and liquids, they told me I had a problem with the esophageal muscles coordinating swallowing, meaning there was not much they could do for me. If you read ALL the side effects of methadone, in a Physician's Desk Reference, it does mention muscle problems. Although this is my opinion only, but I never had trouble swallowing before the methadone.