I Keep Waking Up At 3am Wide Awake For No

I keep waking up at 3am wide awake for no apparent reason. I have a lot of stress in my life and have currently started seeing a therapist, but for some reason I keep waking up at 3am no matter what time I go to bed and no matter what time I need to get up in the morning. I also frequently wake up a few minutes before my alarm in a panic about what time it is.