Look into "self-disciplining" as it really helps you get a grip and control your thoughts and emotions, especially for an anxious person who's thoughts are racing quite often, and most especially when they are tired. The trick is to work on change, use that energy to get the only thoughts you need to power you through your next day as your better self, and not feel frustrated, sad or even depressed about the usual things that you'd feel upset about. Self-disciplining teaches you to have a passion, an occupation, an activity that keeps your mind on track, something to look forward to, something that relaxes you and paces your thoughts down. It can be meditation, it can be exercise, just like it can be anything else you want it to be, something you are passionate about. And plan out how your next day is going to be, what you would like to change about your routine, what you could be doing better in your days, what you want to be doing more, try and look into a reason to feel at ease, at peace, things you are grateful about, things you are willing to forgive now if not eventually, and it's the same in the morning when you wake up, think about what you're going to be doing during that day, what you're grateful for, what you are willing to forgive and or will work to forgive. You have to set yourself goals, you have to set yourself a path to feeling better and letting go off the stress that's consuming you, and I think self-disciplining does exactly that. I hope it helps you as much as it helped me, and if you are interested in learning more about it, I recommend you search it up online!