I had a 16 wk a.natal check today and told the m/w I had been having q. a lot of abdominal discomfort - accross my bumnd low down. She said that I might have an irritable uterus, that it was not unusual in 4th pregnancies and that I should keep a close eye on the pains. The baby's heart beat was fine. Just wondered what this could be. Don;'t know about my uterus, but with my lack of sleep I'm def. irritable.