Had a weird parasomnia

I was like half awake and suddenly heard my pulse in my ears, and it grew loud and i heard a whooshing sound and felt like my bloodbpressure had been raised. I made myself relax and it went away a bit but then came back and i forced my eyes open. I immediately checked my heart, it was beating lerfectly normal and i feel conpletely fine. I have had a few episodes of exploding head so im wondering if it was that

I think @littlemissslothy had this but it was permanent for her.