For the past 3 nights my son will not sleep more than 3 hours during the night. He just turned 12 weeks old this past Thursday. Before he was sleeping 4-6 hours at night and only getting up once. Now he is up at least 3 times a night to eat. Why is he eating so much all of a sudden?! I am exhausted, my husband travels for work 5-6 days out of the week so it is just me doing all the night time feedings. Any ideas or suggestions would be greatly appreciated, trying to wait until 4 months before we start any solids.