HELP

Hi Mummies, anyone experience this before? : 24 Aug - my tummy ache until super badly. doesn't go away no matter what I do. it last for about 5h : 9am to 2pm like that - pain decrease but still in pain from 2pm to night time 7pm - whole body feeling weak - leg feels cramp for a couple of second the moment I stand up then the cramp goes off - no appetite the whole day - had diarrhea x2 (once at noon, another time straight after I try to eat abit @ evening time) 25 Aug - tummy ache only if I walk or sitting down for almost the whole day - appetite is good but stomach feels abit uncomfortable whenever I eat 26 Aug - sudden pain @ uterus / cervix area couple of times throughout the day, not sure why but feel as tho baby kick. just a second long kind of pain. 27 Aug - sudden wake up @ 4am and had diarrhea *baby kicking as usual throughout these days.... * worried its a sign of preterm Labour... previous doctor appointment, doctor told me my amniotic fluid @ border line. borderline 6.0, mine is 6.1. Next appointment is 20 Sept... any advice please? ?