This is a really fun song and I made some chords that I think go well enough for 
you to sing and play to. 

G (320003@1)                DDoctor, (xx0232@1)won't you help me?

                C (x32010@1)                DGive (xx0232@1)me here something, for my heart, my heart is aching.

And that pattern of chords goes throughout the whole song. Hope it works for ya!