I hope you are not handling this yourself. You should have the assistance of an experienced personal injury attorney. Your prior medical situation is a complicating factor, and may have some bearing on who you should go to for medical treatment. Further, transit companies usually defend these cases aggressively. The law in most jurisdictions usually requires something beyond the normal stops and starts of a bus to impose liability. This is a potetially difficult case. Get professional help so that you don't harm your claim. Good luck.
The author of this post is licensed to practice law in the District of Columbia, Maryland, and Virginia. This post is intended as general information only, and is not provided as legal advice in connection with any specific case, and does not create an attorney-client relationship.
Sign up to receive a 3-part series of useful information and advice about personal injury law.