Assalamu alaikum Girls, I'm 19 weeks 3 days. I have tests and the 2nd …

Assalamu alaikum Girls, I'm 19 weeks 3 days. I have tests and the 2nd screening — is it okay to go now? ))) I feel something like it's moving down by my bladder, and it hurts a little and kind of moves. This is my first pregnancy — is it supposed to move like that? I'm wearing a maternity belt; they said everything is fine. They just said the baby's head is down — I walk a lot and get fresh air =) =