Back and rib pain, please help

Megan
Hi, I'm a FTM so I don't know what's normal. I'm 30+4 today and I have back and rib pain so bad the past 4 days that I'm not sleeping. It's the worst when I'm laying but it's bad sitting and standing too. I haven't slept more than an hour or two in 4 days and I have to go back to work tomorrow. I drive 50 minutes each way and I'm terrified I'll fall asleep. I've tried heat, Tylenol, sleeping in bed and a recliner, I don't know what else to do. The pain goes clear up my back and wraps around to my sides. It leaves me in tears for most of the night. I told the doctor when I saw him Friday but I don't think he realized how bad my pain was. Hubby says I should call today and see what they say, but I don't want to feel stupid if they tell me it's nothing. Any advice?