#cross laterality

i am cross-dominant (neither right-handed, left-handed, nor ambidextrous; with some tasks my right hand is dominant, with other tasks it's my left hand) and during a neurology seminar i got told by a lecturer (a neurologist) that i might actually be left handed and, uh, peer pressured/influenced into right-handed writing? i see some premises that would support that, but i also feel like my brain might have been (and still is) undecided on which side it prefers, and very plastic and susceptible to changing sides. the truth is probably somewhere in between, or both could be true at the same time.