salaam,
yes we do have alhumdulillah
its:
put ur hand on the ailing part of body and say:
bismillah - in the name of Allah (3 times)
aaoodhu billaahi wa qudratihi min sharri ma ajidu wa uhazir - i take refuge in Allah and within His omnipotence from the evil that i feel and am wary of. (7 times)
Source: Book Muslim
u need to have complete trust in Allah to enjoy its effectiveness. keep making dua as well