If you are a medic, you are no doubt well educated and used to thinking carefully about what you're doing (if you aren't, I hope that you're not my GP anyway). I'm an engineer and am much the same, and equally took a very long time to learn to fly.
The problem with people like you and I is we think too hard about what should actually be a skill - it's a bit like what sport coaches call "body memory". You need to train rather than educate yourself in the handling part of flying. This is very different to the way you learned your medical skills by and large.
I suggest talking to your instructor about this, and whilst learning think about one item at a time only - speed control, attitude control, whatever - just get one thing right at a time. It (eventually) worked for me, and actually if you are getting one or two things right the rest tends to fall naturally into place.
A good book on the process of learning skills like this (albeit that it doesn't mention flying at-all) is "the inner game of tennis" which is a bible for most sports coaches, it might help.
G
N.B. The good news is that after the long slog to learn basic skills, you may find that the more advanced stuff, which requires more analytical ability, comes much more naturally to you than many others who got to first solo quicker. Don't give up, I took 2 years to get my PPL but now fly 100hrs a year, including some low grade test flying.