Welcome to Healing Well! I am so sorry that you have had such a tumultuous eight years. As a nurse [RN? LPN? CNA?] I am sure you have heard of JCAHO. Is the hospital that will be caring for you JCAHO accredited? If so, those standards are the minimum that should be followed in terms of infection control. If you look around at the following site, hopefully you can access the info for which you are looking.
Also, many, unfortunately not all, hospitals have a patient advocacy department. You might want to find out if there is one in the hospital you will be going to and seek them out. Explain your concerns. Then when you are admitted, put your training to use. Be vigilant about speaking up when you have concerns about possible breaches in protocol.
I wish I had the perfect answer to your question about who is looking out for patients. Unfortunately, though every place has a "Patient Bill of Rights," not all are as diligent in following them. Get a family member or friend to accopmpany you, to be an extra set of eyes and ears.
Good luck and I hope all goes well during your hospitalization.