35 weeks, what are these symptoms

I am 35 weeks pregnant. I have for several days been having braxton hicks contractions. I went to labor and delivery saturday morning because i woke up with bright red mucousy blood when I wiped. They couldnt find a reason for the blood but kept doing a cervical exams every 2 hours(even though with.my first child i had a csection because i.could not dilate). They sent me home. Well its monday now and in still have lots of cramping. Some more mucous stuff when i wipe. My back...my back in a whole feels like a whole crap. Clear down to my lower back. I messaged my drs office and they do not seem to worry. I have a scheduled csection may 6th. For GD, high blood pressure and my babe had a hypocoiled cord. Hes still moving