Can I persue a malpractice suit a year after the incident took place?

I was diagnosed with an incurable bladder disease in june of 2012. My local urologist insisted on cathing me each time I was in his office. This meant getting cathed six times over the course of two weeks, and several other times on seperate occasions. I was also put on a pill that is supposed to help with bladder spasms. After being on the pill for a while and asking (everytime) to be cathed with a size eight cath instead of a size fourteen, I went in to have medication put directly into the bladder. At this point my medical care providers noticed that my bladder was shutting down. Two weeks later my bladder shut down completely and I was given a folley cath and a urine bag. I lived this way for several weeks before finding a specialist for my condition. Upon my first visit to this specialist I was informed that my dr should have taken me off the bladder spasm pills at the first sign of a lethargic bladder. I also found out that due to the trauma of being cathed so many times I had developed a seperate condition called pelvic floor dysfunction. I should also include that when I asked my urologist why he didn't research such an unknown disease, he replied, "i have no interest in researching anything".

Can I still file for a malpractice suit? Do I file against the entire medical firm since I saw three different drs from there, or do I file three different suits?