So the most likely solution to your sensitivity would be to
(1) Minimize acidic drinks, like soda, juice, and lemon water
(2) Start using a toothpaste for sensitivity, like Sensodyne or Colgate sensitive. Be patient with these - it may take 1-2 weeks before they really start working.
If the issue is still not resolved, your dentist may prescribe for you a stronger toothpaste, or, if you seem to be grinding your teeth too much, may make you a nightguard to protect your teeth from abrasion.
Note: There are endless treatment options for sensitivity. Try these first. No one should have to live their life avoiding a good ol' ice coffee!
Joseph J. Lee, DDS