what to do...

so to say im angry is an understatement. Apparently F wrote me a letter and sent it to my house which pisses me off to begin with. What pisses me off more is that my younger brother took it upon him self to intercept the letter and hide it from me. I found out about it b/c his g/f told me she heard my brother n my father arguing about a letter from F to me. SO i confronted my dad n brother and they both lied about it. I Finally got it outta my dad and after a few harsh words from my brother he handed over the letter to me. The letter pretty much said how he would die with out me and doesnt want to live life if im not with him. At the end of the letter he mentioned that he got blood work done at the jail and the results were not good at all and that we needed to talk about that. Now i dont no if he is being his usual self and saying that to get me to worry so much that i break down and go see him or talk to him, or if he is serious. The thought makes me so sick to my stomach. I dont know what to do. I think i should go get tested again to be safe and if it comes out fine then i have nothing to worry about. I cant worry about him and i cant let what he is saying about wanting to kill him self upset me. I just can't deal with this shit anymore i want it all to be over.