28weeks in a lot of pain

Okay so im 28 weeks, I’ll be 29 on Monday, but im in a lot of pain. I woke up at 6 this morning and I thought i had was a stomach ache but it just won’t stop and it’s been almost 4 hours. It doesn’t feel like I need to go to the bathroom and it feels like cramping almost at times. I called the ob floor at 7:30 and they told me to take Tylenol and a hot shower and that it’s probably the muscles in my stomach getting stretched. But this is my first and it’s the most pain I’ve been in. They said I could go in but they made it sound like I’m just having stomach problems or something. I just don’t wanna make a big deal of it and waste their time but hurts no matter if I lay down or stand up and walk around