I gave myself eyebrow slits with a razor and I want to know if the hair I shaved will grow back?

It's difficult to tell, but it may not grow back. Prp and progesterone can be used to help regrow the hair. I recommend getting a formal evaluation with a hair loss expert. Best, Dr. Emer

Agressive plucking/tweezing of eyebrow hairs can certainly lead to permanent alopecia. If you are concerned about this, I recommend avoiding this action. The eyebrows will likely grow back if you just shaved them.  

Shaving the area shouldn't cause Hair Loss but over plucking can cause damage and this may increase the risk of Hair Loss in this area. Every time you pluck the hair you will cause some slight damage to the follicle, repeated plucking is associated with Hair Loss.

When you pull out your eyebrows, no matter how you do it, it may not grow back. Leave them alone, cut them if you wish, but do not pull them out for that is what causes permanent eyebrow hair loss in some people