asalaam alaikoum. sorry I was not sure where exactly to post this!

I have been having nightmares for about a week now, and they are very intense and scary and they wake me up at night. I am wondering if this is a sign of something? For instance, last night I had a horrible dream that woke me up, and I sensed a bad presence in my room, so I said "audhu billahi min ash-shaytaan ir rajeem" over and over, and then I moved to a different room. I was really alarmed by this because it's never happened before where I actually felt frightened after I woke up. I have been going through a lot of stress lately so I don't know if that would be related. Any tips/advice to stop them?