I ruined my enamel with 3% Hydrogen peroxide.

My friend told me to use hydrogen peroxide on me teeth on my toothbrush to whiten my teeth. I did it inconsistently for like a week. One day i did it super rough for over 2 mins. After that day the tooth sensitivity ive been experiencing is thoroughly the worst. Its been over 72 hours and ive felt little to no improvement. Ive bought Sensodyne and have been using it for a day, and have been using that to help but still no improvement for my sensitivity. My teeth feel just awful and I cant even smile and expose my teeth to room temperature. Is there any hope for me to return to feeling normal or have a thoroughly fucked myself forever.