to sakurasake41 san
I think you had better go to big hospital as Nyororin san says.
for example
高井戸 浴風会病院
http://www.yokufu-hp.jp/summary.html
Perhaps most doctor can speak English.
Necessary treatment will be done if it speaks in detail(from karaoke to now).
Please write on paper if it worries.
Please take care of yourself.