I Am Currently 37 Weeks And 6 Days Pregnant I've

I am currently 37 weeks and 6 days pregnant I've been having back pain and menstrual like cramps nothing close together and then all day today I've started have diareah this is my 2nd child I delivered and 39 with. My first could I be having early signs ofnlabot does this mean it'll b a few day till he arrives?? Everything increases whenever I'm not laying down