Struggling with Body Image and Self Control

when there is something wrong with my body, i tend to... freak out a little. for example, if i notice my hair is a little longer than i like i will immediately shave it all off without thinking much about it. this is why i don't think i could ever become pregnant. even if i wanted to, what if, for just a moment, i decided that having a live being inside of me is bad ? what would i do to the baby ? these are thoughts that i think will forever haunt me. i'm trying to work on my self control, but the more i do, the more i notice how bad it is