i have a similar issue, and been working on it for a while now, its slowly healing. here are some ideas.
as much as possible do left handed things: brushing teeth, signing your name, using utensils.
as much as possible cross your hemispheres by touching left hand to right side of body and vice versa. research brain gym, cross crawl exercises, hook-up exercises etc.
when in meditation, touch fingertips together at heart center.
imagine large white X's in the air in front of you that cross all planes.
do slow eye and neck and tongue rolls in all directions, X's and figure 8's.
when imagining what the problem looks like, also imagine what the right, strong side looks like and literally teach the left side to be like that too. this is existential and "imaginary" but your subconscious doesn't care. an example is, my initial thought is that my right side is "golden light" but my left side is "stringy black". so i imagine the stringy black changing to synchronous pulsing gold and CONSISTENTLY hold it there with intention, checking back in with myself every so often to make sure.
with exercise and neuro-muscular rehab - correct asymmetries using gray cooks' functional movement systems. this is kind of straightforward if you start learning his methodology.
see a chiropractor or pilates instructor to ensure that your bones are in place symmetrically, especially hip/sacrum. left jaw misalignment can effect whole left side of body. also ear infections (even as a child), and tooth decay even if it's a filled cavity may have hidden infections.
since the left side of the body is right brain - do more wholistic, creative, visual activities. photography, art, drawing, painting, music.
