What is the time limit on a personal injury case? I live in an apartment and fell through my kitchen floor back in December of last year is it to file

I am on section 8 housing. I moved into my apartment in August of last year and found a soft spot in my kitchen floor. I told the office about it and they said they knew and would get to it. I found another soft spot in my kitchen a few weeks later , and one in my bathroom as well. I told them office again in September. Then in October I told again and I write them a letter. Still no response. So in November I told them again when I paid my rent and I wrote another letter and sent a copy to my HUD worker. Then on December 11 2016 I fell through my kitchen floor down about three feet or so. Now I am a big girl and I hurt in several places from the fall . My neck,back,right ankle, and right wrist. I have had previous injurys to this areas in the past and was under medical treatment for my back and right wrist at the time of the fall. So my questions are these :Is it to late to file a suite , and if not do I have a case in which to find suite? Went to ER and have pictures.