Hello girls! 23 weeks pregnant, my belly and lower back hurt like cram…

Hello girls! 23 weeks pregnant, my belly and lower back hurt like cramping pains, as if I need to go to the bathroom urgently. Yesterday they admitted me to the hospital with the baby, everything is going well, they're giving injections so that the baby's lungs open up. They say just in case, suddenly premature birth might start. Now I'm lying down and scared. Maybe someone had this experience, maybe it will stop hurting too?