Advice please?!

Rebecca
Any one else experience this ?
I have had quite an upset tummy for 2 -3 days now ...along with braxton hicks . But the past 24 hours I have the most incredible consistent back ache I've tried pain killers, hot water bottle, bath , walking , resting but this back ache will not go away , there's no pains in the front just the bh tightening feeling and the back ache is lower and goes to hips any one else experience this ?