Can my heterozygotes status of congenital adrenal hyperplasia (21-hydrolaxe deficiency, salt-wasting) explain hirsurtism & symptoms like polydipsia?

Maybe: Hydroxylase deficiency is actually a continuum, and there are many alleles. A workup is probably not worthwhile. Manage unwanted body hair with electrolysis or lasers -- you're doing yourself a favor. If your urinalysis (chemical, sediment), renal functions (BUN, creatinine) and concentrating ability (SG >1.020) while thirsty) are normal, I would not recommend further studies.