Constant cramping 27 weeks

TELETHA • 6th pregnancy two live births. Ive had a tubal ectopic and 3 miscarriages. We are so blessed to have this baby and we cant wait to meet our little bundle 💙💖
Hi im 27 weeks and for the past few days i have been having constant lower abdominal pain like menstrual cramping also with back ache. Is this normal and what could be causing it? Ive tried drinking plenty of water laying down and warms baths with pain releif nothing releives it