How to help husband

So yesterday things came to a head with my husband and myself. I calmly sat down and expressed how I had been feeling. I asked him to consider me too in regards to how much sleep and to pitch in when possible.

We have young children and he's not ever woken up with them. As a stay at home mom he doesn't lift a finger in our home.

This morning he got up with the kids even made them breakfast and did dishes. I was amazed. By afternoon we both were tackling household projects inside and yard work.

He went to pick up our grocery order and said on his way to the store he became horribly sad. Starting to cry. When he got home within 20 minutes he was sobbing and walked out to our woods for fresh air. I asked him what was wrong and he said he didn't know.

Later he went to play a sport and came home. Still really upset. He keeps talking about how he should be happy. How he doesn't understand how I can love him if he isn't. That he doesn't know what is wrong with him.

I am generally worried about him. He did say he doesn't want to harm himself at all just he is really sad. I know yesterday was a tough conversation but honestly I didn't think he took any of it to heart at the time because he was so combative at me at the time. Today I thought maybe he realized all I was juggling and had been juggling and maybe appreciated me more. However that shouldn't have him break down in tears.

How do I help him...I am genuinely very concerned about him.