I can't seem to fret the notes correctly between my left hand's middle and pinky fingers. For some reason they just do not interact well and this has been happening since August. I have tried to do alt-picking exercises designed for those two fingers, but they are still awkward and just not flowing. I can play ok with my ring and pinky, but I do notice my pinky is very weak. Does anyone know how to both increase strength in my pinky and increase a smoother interaction between my middle and pinky fingers? My fingers are very small and my pinky is even smaller so it makes it tough to reach other the fretboard to the lower strings (5th and 6th), and it tenses my left forearm.