I am 31 weeks and 4 days pregnant, last night I suddenly went hot and started with stomach cramps , I then had diarrhoea, this passed however the stomach cramps continued, I managed to sleep but when I woke this morning I still have stomach cramps, nausea , lower back pain and a loss of appetite . Is this something to be concerned about? (this is my 2nd child and I am 24 years old)