Doctor's baffled

Mom's back in the hospital. I took her in today at nine in the morning. Doctor didn't decide to do anything until three thirty in the afternoon and they didn't get her into a Cat scan until eight tonight. I was with her most of the day, son is with her now and I'll be back first thing in the morning as I'm sure there's going to be a huge fight over whether to give her a stress test.
Everything they do is coming up negative, but she's still having chest pains.