I must agree with Marynf. Historically, I've not been what one could call a totally dedicated guitarist. In fact, for a number of years I barely played at all except for my annual appearance at the Getaways. Nonetheless, even with so little stimulation, certain aspects of playing somehow sifted into my brain. Even now that I am playing far more often than ever before in my life, I find that my mind seems to continue working on various chording or fingering problems during the spells in which I am not playing.

I'm sure I am not alone in having had the experience of trying unsuccessfully to work out the chords for a new tune, giving up in frustration, and then discovering some weeks later that I suddenly had it all worked out despite having made no further attempts.

In short, perhaps it would be best to give yourself a break. Allow your mind to work a while on the problems you've had. Then, when you are once again at peace with yourself, give it another go and see if maybe things go a little better. Worth a try, no?