How long do I have before deceased, boyfriend's children kick me out?

My father-in-law passed a year ago and then my boyfriend, of 12 years, just passed Saturday morning from stage 4 lung cancer.t My fil left an old double wide to my boyfriend. To make this vs more complicated, he did not have a will or life insurance. After my fil passed last year, I begged him to go to a doctor. There had also been a promise ( not in writing), that my fil was going to leave me $24,00, to help me. Unfortunately, he passed before attorney could draw up papers.Even when b.f got diagnosed, I took care of and wanted too. He also had so many other health problems. The night (early morning) he passed, beforehand, his son and daughter, were going through his personal items, which bothered me, because, I thought it insensitive towards me, and disrespectful towards him. It has not been but two days, and the son has asked me when I am leaving. I told him I needed at least a month. I have to not only say goodbye to my former home and boyfriend and find homes for one dog and two cats. I am still grieving, of course. And on top of everything thing else, the son is taking my boyfriend's truck, which he was going to leave for me. There was a power of attorney, done in the hospital, while I was visiting. I do not understand that either, as he was by this point, dealing with brain tumors and was mentally, not right. How much time, do I have, to leave. I need at least a month, to gather some money and sell some of my items. Sunday, they came over and finished taking his amps ( he was a musician, tools for carpentry work. I was hurt. And still am. I am watching the things he loved, leave, most of it to be sold. The title of the truck is missing too. My name is on insurance. The son has several automobiles of his own.What are my rights? Can I take civil action for the truck? And how many days do I have, before I have to vacate?