Seeking advice

So recently I have been so stressed out that I can't seem to sleep for long. When I do fall asleep I don't know when,I just know that I'm suddenly awake and my heart is pounding. Something about being in bed causes my body to go into fight or flight. Im worried that a lack of sleep and potential medical arising from it are going to be my undoing.

I do breathing techniques and watch guided meditations and I can't seem to let go of the stress. My tongue is constantly touching the roof of my mouth

What has helped folks here reduce their stress and learn to live a normal life again