Please tell me if anyone has encountered such a problem as liquid stoo…

Please tell me if anyone has encountered such a problem as liquid stool ? I have had loose stools for two weeks straight, went to see a doctor! They put me on a diet considering that I am already losing weight! Just at 30 weeks my baby turned upside down and lies correctly down, they said it could be premature birth! I feel false contractions at night sometimes! I told the doctor that my bones are spreading ? to which she said I need more calcium, seriously! And my blood levels of gamma globulin are also lowered! Question is, what were your pre-birth appointments like? This is my first pregnancy.