Oh girl, it was for us too. From 3 months until almost 5 months. Then last night and the night before, we decided to take him out of his sleep suit and lay him down in his bassinet and he fell asleep and began sleeping 4 hour stretches again. Before this he got worse and worse and couldn’t be put down at all and wouldn’t sleep more than 45 minutes at a time. All that to say, it does get better but it is sooo tiring in the thick of it. Take care of yourself and try to nap whenever you can!