i'm sorry about what happened to your dad.
i came here tonight because i, too, think i'm dying of something that no one can find. my dad had a heart attack in december which made me realize my own mortality. i think it's some form of post traumatic stress disorder. what i'm trying to do is sit and breathe deeply and relax and stretch and try to get my head together and realize that i'm overreacting. if you saw my search history you would think i was crazy with all the symptoms i've punched in the last while. it's exhausting and my stomach is sick with cramps (which i think have something to do with internal bleeding.. sigh).
know you are not alone. i can't promise that everything is perfect in your body right now but i have a 99% sureness that you are okay!