My wife is 37 weeks 4 days. From 3 days she is having back pain with sweating  not continuously but irregularly when she takes rest and lay down its reducing. Today we went to doctor she said there are no contractions and next week we have AFI and FEW scan and she also told till 15 days delivery might not happen. Then y these back pains are coming how many days false pains might be there and how to identify true pains? Fundal height is 36cm so what would be the baby weight?