Im dying

Iam just lost. Honestly I dont even know what my condition is. 6 months ago it started, I was always full, couldnt eat and when I was stressed it I felt like throwing up etc. Now a month ago a was kinda feeling alright as long as I didnt go outside. But now I cant eat normally. Today I ate about 1000 kalories. I feel weak I am constantly feeling full and when eating I fell like throwing up. And Honestly sometimes and ending it all even comes to my mind. Im not gonna do that of course but it did cross my mind and its happening more often nowadays. 19 male btw. 113 pounds, 51 kg