Is there any way i could change my 3b hair to 3b/3a?
Unfortunately, there's not much in terms of natural and healthy ways to make your hair 3b/3a. I mean keeping it 3b is a relatively easy task, but to get 3a hair, you'd have to try styling methods. You could try rollers, flexi rods, perm rods, etc. Using the chemical route, you can texturize or texlax your hair, but this would be pretty hard, and unpredictable, to do in sections and doesn't make your actual curls bigger, just looser. Chemical routes will also result in damage to your hair. You could attempt heat training, but the results with this are unpredictable as well and will always result in some degree of heat damage.