Extreme tooth sensitivity 😖

Out of the blue, I’m experiencing the WORST tooth sensitivity in one of my top molars. I can’t chew or drink anything on that side, regardless of temperature. I’ve been brushing with sensodyne and trying to avoid anything touching on that side. I’m struggling to drink anything and have been feeling really dehydrated. I tried using a straw and tilting my head to the side, but nothing has worked and it still feels absolutely terrible 😭 I called and made a dentist appointment, but does anyone have any tips for some relief before then?