What am I feeling?? Help please

Ok ladies, so I’ve been feeling this aching uncomfortable pain since 5pm

It’s in my pelvic area it gets realllllly tight and achy and my stomach would tighten up

It’ll last for about 30s and it comes and goes.

The advice nurse told me to take a Tylenol and rest for 2 hours and see how I feel then. It’s been a hour now and the pain hasn’t gone away yet.

There is no bleeding , leaking fluid and my son is still active

Is this round ligament pains or Braxton Hicks of some

sort?