Hello girls! Is it normal to check for fetal development (ultrasound) …

Hello girls! Is it normal to check for fetal development (ultrasound) at 37 weeks? It's not possible earlier. I have such unbearable pain, I've been taking calcium and a bandage for a month now, but this pain doesn't go away, how can I keep going like this? I've never experienced anything like this before, I walk like a duck, the midwife says to take calcium and a bandage, is there nothing else we can do?