Hi Dandelion,
Try following some mindfulness breathing. You can use you tube, or there are apps like Headspace and Calm. You can also try four x four breathing, breathe in for four, hold for four, out for four. I sometimes hold a second or two longer and breathe out slower.
Let go of whatever happened today, or prior to today to make you feel this way.
Make a list of things you are grateful for, read that before going to sleep. Tomorrow is a new day, and a chance to make new choices.
Sending virtual hugs your way.
❤️ Delilah