Something extremely weird and frightening happened

Last night I had a dream that I was lying on the floor and my heart was beating so fast I couldn't breathe and I was going into presyncope and my legs were shaking badly and they were tingely and numb. I partially woke up and I was hyperventilating, but I was in a half asleep half awake state and I was shaking.

I'm not quite sure what happened or if it all was a very scary realistic dream, but I swear I woke up and I was experiencing what I described in my dream. I am concerned and didn't know what subreddit I should ask since I told my mom and she was like "Oh that's odd".