I'm nearly 20 week pregnant and in the last couple of days I've not been feeling the baby move. Even though in the previous week or two it moved every day. I suffer from constipation so can't be absolutely sure if the bubbles inside me are from digestion or the baby. Phoned my midwife but and left a message but nobody called me back. Had a whole can of ice cold lemonade and still nothing. Is it normal?