I was told at age ten that the chemo , stem cell transplant would damage my reprodctive parts, my cycle is irregular should i discuss birthcontrol?

Go seek Gynecologist: You will benefit from a consultation with a gynecologist to check your ovarian function and to advise you regarding birth control.

Yes but unlikely: Usually radiation treatment to pelvis , chemotherapy results in infertility , as you had chemo at a young age , ( ovaries may not developed ) possible you may be ovulating , if you are ovulating , yes your need birth control , although is unlikely , speak to your gynecologist