The real problem with flat ironing and bleaching is that the damage is cumulative. If you have very short hair, you may not see all that much damage because you're continually cutting it off, but anything below shoulder length is likely to be in trouble. And, as Firefox said, damage is permanent. The best you can do at this point is mitigate the damage by treating your hair as gently as possible--avoiding using shampoo too often, COing instead, and protein and moisture treatments. Typical kids' shampoo, btw, isn't less harsh than any other SLS type shampoo.
Elumen is a demi-permanent color that is pretty gentle. I used it a number of times on waist- to hip-length hair without damage, although I always did a moisture treatment after. But what you really need to do is just grow out and trim off the damage.
Former longhair, now CG, living in N. California where the fog meets the wind
3a/b, fine, normal porosity/elasticity, high density
Conditioner wash and style, sometimes with a dab of BRHG.