Thanks for your query.
You are 37weeks pregnant and this is your third child so you know there may be some stomach problem are there because of hormonal
changes during pregnancy
and back ache because of weight bearing effect of the body so please don't worry.
Use some pain killer for local application.Eat non spicy food at frequent Interval.
Consult a gynecologist for your C-section,to see the maturity of fetal lung.