I don't know about meditation, but taking several deep breaths when upset or anxious can help. As another poster mentioned, do try to find out the cause of your anxiety, so you can deal with it. Also, try exercise, as this releases endorphins which are mood boosters, and the exercise will help tire you out, so you can sleep. Reading funny stories, and watching funny shows also helps as laughter also releases endorphins. Find ways to occupy and distract yourself.
- Take courses, either in person or online. Some online courses are free.
- Take up a hobby.
- Join a club.
- Volunteer. There are people out there worse off than we are.
- Surf the web.
- Do chores.
I know that doing stuff to keep occupied and distracted works, because I suffer from lifelong depression, but have been managing well for some years now with this method. My last bad spell was due to a combination of health problems, money problems, and problems with the relative I was living with. I still have health problems, but have received some treatment for them. My money problems have been greatly relieved, and I no longer live with that relative. Other relatives bought a trailer home for me to rent from them. My depression and stress levels went down once I was living alone. I don't do well living with people, as they don't handle my differences well, and I don't handle their unmeetable expectations, frustrations, and anger well. I still have issues, but keeping occupied definitely helps a lot because it leaves less time to dwell on the unfixable parts of my problems, or to dwell on things in the past that are over and done with.
So, now that you have some ideas to try, go do something!
_________________
If a man does not keep pace with his companions, perhaps it is because he hears a different drummer.
Let him step to the music which he hears, however measured, or far away.--Henry David Thoreau