It's good that you noticed a pattern for when your emotions seem strongest. That gives you more info to work with.

The later in the day, the more I have thoughts of self harm too. I began doing cross stitching (to keep my hands busy) while watching TV or listening to the radio (to keep my mind busy). I didn't know or care how to do any handcrafts 'till someone suggested to me that I keep my hands busy. I took them up just to help out with this. Then, I try to keep my work somewhere I can see it, so when I'm reminded of how badly I feel I can also be reminded of the beautiful things I can create if I choose not to self harm. Hope maybe some of that helps.