Lower back pains?!?!!

Taya

Went to the hospital the other day for cramping because my doctors sent me, they tested me positive for preterm labor and put me on bed rest. They gave me 2 shots to mature her lungs and ever since I’ve had lower back pains like sharp pains here and there but no contractions (that I know of) and also my hip bones and pelvic bone have been killing me every time I move a certain way. Is anyone else experiencing any of this? Should I tell me doctor about the lower back pains?