Med mal cases are among the most technical forms of litigation. You need to hire a qualified attorney to help you determine (through an expert opinion of a qualified doctor) whether there was negligence and, if so, what damage it caused. Remember, bad results sometimes occur even if there was no negligence.
Evaluating any legal question requires a detailed knowledge of the specific facts involved. Since a short question will rarely contain all the relevant facts, the answer here should be considered a general comment for your consideration and not legal advice.
Based on the information you provided, it is unclear whether there is a case worth speaking to an attorney about. I would need more details about the surgeries that you initially underwent and which had to be re-done. Infections are a known complication of all surgical procedures and the fact that you developed an infection would not necessarily indicate that you received substandard treatment. You may want to contact an experienced medical malpractice attorney who can speak to you much more in depth concerning the treatment that you've had to date.