The thing I'm most worried about which has yet to be explained to me by my doctors is rarely when I do strenuous activity from a standstill I get waves of pain each time my heartbeats; it starts around where the kidneys would be and then it creeps further up my spine each beat until it's right at the back of my head. It feels like my circulatory system is being pumped up by a bicycle pump and I have to take a moment to just tilt my head towards the ceiling and squint my eyes until it stops, which takes maybe 45 seconds; unsettling though.
It probably has something to do with the fact that my kidneys stopped functioning four years ago and all that's really left of them is scar tissue, 'cept for the slightly used one I acquired shortly after that; but that's a looong other story.*
My left eye twitches pretty violently when I haven't gotten sleep in a while; sometimes when I bend my left elbow it's a little hard to unbend it and it makes a satisfying crack when I do
*Long story short, I have more kidneys than you do noob.