My 10 weeks old has gone from pooing every day 1-2 times to 3 days without poo. Then he had one big poo and now again 2 days without it. Has very smelly and frequent winds and often cries when passing winds. Has reflux and on ranitidine. Three days ago just sleeps all day and eats smaller volumes, doesn't cry for food. Eats 60-90 ml often every 4-5 hours. Then he may eat 150ml and then 60-90ml every 3 hours. I am wondering is this all normal and what should I do?