I was infected by a bad needle from a doctor who was extracting fluid from my knee and I got staph on my bone, and was hospitalized. Do I have a case?

There are not enough facts here to support anything more than a guess on whether you have a meritorious claim. I recommend that you promptly contact a medical malpractice plaintiffs' lawyer who practices in your area.  For help with your search, please follow the link below to the website of the Texas Board of Legal Specialization.  The specialty for you to search is Personal Injury Trial.  The list of names you find will include both plaintiffs' and defense lawyers.  To learn which ones are plaintiffs' lawyers who prosecute medical malpractice cases, you'll need to visit the websites of the listed lawyers. Good luck. www.tbls.org