Hair Trauma After Extensions: Will my Hair Grow Back?

I have a scab in the middle of my head from wearing hair extensions. The extensions were so tight i took them out after 3 days. My scalp was bloody, itchy and flaky. Days later my hair began to fall out. My scalp looks like it is healing but as it heals more hair falls out of the area where the scab is located. Will my hair grow back? I never where my hair this tight this is the first time I have ever experienced anything like this. My hair is generally healthy and thick.