Thank you for posting your query.
It seems the hip injury
and the dead lift injury are not related to each other. They are two different episodes. The pain you felt is most probably because of the dead lift. Dead lift is a tricky exercise and even a weight of 65 pounds can put pressure on your lumbar disc. A faulty mechanics during the lift must have caused excessive strain and thus the pain.
Try taking some muscle relaxants and apply ice on the region. Also go to a physical therapist and he'll work on your core muscles and your abdominal muscles. Perform exercises on the regular basis so as to have a strong core. A strong core and abdominal muscle will protect your lower back and thus help in relieving the pain by improved bio mechanics.
Also an assessment needs to be done by an orthopedic to check if there is any problem or pressure on a disc leading to pain in your back. Is there any radiating pain
in your leg?? Because that will be a red flag.
Get well soon!!!