Re: Feeling overwhelmed and tired
3 months is a hard stage, mama! Baby is still so needy, and so unable to entertain himself. I totally second the advice to get out of the house if possible- even a trip to Target can seem like a vacation when you're pinned down with 2 kids. Let the older one run up and down the aisles, and the younger one nap in the sling...
Have you read Elizabeth Pantley's book "The No-Cry Sleep Solution"? It has advice on gentle ways to get a baby to sleep longer and more independently. They might work, they might not- but at least you feel like you're doing something about the sleep issue! And now is a good time to read up, since IIRC Pantley suggests not trying to make any changes to your baby's sleep patterns until 4 months.
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"