Back pain 😭

I am having a trouble working bcoz of my back pain. Im at 16th weeks. This is my 3rd pregnancy but 1st and 2nd i didnt felt bcoz that time im still so young and not working. My 2nd was 12 years ago, so given the long gap i felt like its like a first time mom again. I am working as a nurse and it is very difficult for me to move and walk and also carry patients. As a healthcare worker i know exercise will atleast ease the pain, but after work i dont have the energy to even move a little.