My teeth are all so sensitive?

Anything I eat or drink, hot cold or warm, hard soft or fluids, it’s all sensitive. Often it’s painful and other times it’s nerve ending pain. I’m fairly healthy and this is very onset.
I already brush with Sensodyne toothpaste and drink from a straw while covering my more sensitive teeth with my tounge. They feel thin and ready to break.
Do people reach an age an their perfect teeth begin to go thin and hurt? :(
My teeth are all so sensitive?
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