Hi all im on metformin, with bad stomach cramps and diahorria, to the point what i eat goes straight out,i not eaten anything today, it keeps my sugars down, it is the slow release stuff, i cant stop eating, my bum is sore to the point of bleeding, and piles have shown up, i feel absoultly awfull, but my baby is big, and suffer from spd as well as anemia.how long should i keep it up for, its been 3 days. xx im 34 wks gone, with my 4th pregnancy, wasnt gb before.