I've been having awful nightmares lately

It's really good you've summoned the courage to talk about your dreams to other people. It can be a hard thing to do.

I would start keeping a diary on the dreams you have. I would recommend starting your nightly entry a couple of hours before when you would go to bed. What you did, ate, time you actually turned off physically to sleep. If you have a dream, write down details, who was there, why you were there; stuff like that. Random I know, but if you do end up seeking professional help with your dreams, you'll have written info at hand so you're not trying to remember in great detail when questioned by the person giving you help.

You could also attempt to drive the dream and see if you can disrupt it a bit. If you're awake enough. When the people arrive to rescue you, tell them what you know. See what they say. Or research how aircraft doors work in flight and use logic to disrupt the image of the door just opening in flight. If you notice enough you can sometimes use logic to let yourself know it's a dream, not reality.

I say this because a few years ago I was refuelling jets on a 12 hour shift for nearly 5 months straight. I lost my friggen mind. It was 7pm start 7am finish. I was by myself doing alot of work for 1 person that was ideally meant for 2 or 3 people. I was single and the airbase I was at was in the middle of nowhere. But i'd have dreams that there was a python (aka Anaconda movie), in my room, in my bed, or near my bed, and I'd go ape sh#$. I'd smash my room up, looking for this thing, heart pumping, eyes bulging in fright. I'm not a fan of snakes. But eventually, after the 3rd or 4th room tossing, I'd start to question myself why there'd be a python in my 2nd storey barracks room. So I would check myself as soon as I woke up with that feeling of impending doom. But up until then the python was friggen REAL hahah

That was stress doing it to me, over a long period of time I'd slowly get worn down by it.

Maybe your stressed, I dunno. Keep a diary and see what you observe.

You probably need to talk to someone about it. Not a psych initially, but a human, just to get it off your chest physically. Mum or Dad could be a start. But I'd talk to them not as a teenager to a parent, but as an adult to an adult. To kind of get the message across quickly so there's no doubt that you're not being dramatic. Parent's at times can doubt or downplay things, particularly if they're busy with somthing else. Not all are like that but some can be.