Help! I'm so hopeless and devastated...

[peaceSJ]

I felt so bad today.
Both me and my H works FT. Last week my H said he changed his work schedule from 8:30am to 5:30pm, so he can pick up the kids at daycare around 6pm. I dropped off the kids in the morning. I agreed. But during the past three days, he always left home 9am in the morning and pick up kids late. When they got home, it was already 6:45pm. Then the kids ate dinner, did homework, took shower... It was so late when the kids got to bed.

So this morning I asked him if he can pick up kids a little bit earlier as he promised before. He seemed got angry and replied in a very cold stone:"No, I cannot. The kids didn't complain anything. Why do you care so much about such 15 minutes?" I replied:" Not that I care about the 15 minutes, but I want them to be home a little bit earlier so they can do things not in a rush. Also you promised before that you can pick up the kids at 6pm."

When I talked him this morning, I used a very friendly tone. But still He got angry and cold. I don't understand why and I feel I cannot trust anything he promised. :-(
I feel I cannot trust anything he said now.