hypersensitivity to blood

by Deb B
(CA ,USA)

I have a child diagnosed with Sensory Defensiveness. We have had 2 years of working with an OT doing Vital Sounds music and Skin brushing etc... It has helped. BUT, last year I noticed a change in her - at 13 years old acting like a boy. I suspect, and OT confirmed her issue with blood is more than she can handle. She has not gotten her period yet (although she spotted last year is when it all started). Her behavior counselor said she can actually hinder her development acting this way. I believe she is thinking if she looks and acts like a boy she won't have to deal it. We need some serious help. She has to get over her fear of blood some how. Our OT was suppose to find some help on that area but apparently has not, nor have I found anything on the internet. Can you help?!