Dear Homeless
Regards playing your 'A' - if you have 'broadish' fingertips then try playing the 'A' with only two fingers and 'dropping the angle of your hand/wrist slightly. I
use my index and middle fingers to hit an 'A' and an 'E sus 4' (same fret, three strings but the 'E-sus' is played one string higher - (G,D & A strings as opposed to B,G & D strings) and then raise the wrist angle to play the A7, Em type chords.

Still worth a try - especially if one finger just will not do as it's told!

Muttley