Stressed out

Dh and I just had our second daughter, she is 10 days old. The first few days we had her home were great, he was great and such a help; but now all of it has stopped. He won't lift a finger around the house, doesn't do anything with our 5 year old and on top of all of it he goes to the gym for a little over 3 hours a day... I'm so stressed out its bringing me to tears. He expects me to do everything and still be able to give him "attention" I feel like I'm at my breaking point and just don't know what to do....