Grandparents are on their way

I’m a 19 year old female. I woke up with incredibly horrible back pain that’s making it hard to breathe. I had to roll off my bed onto the floor in hopes the hard floor would somehow make it feel better. Everything in my middle back around to my lungs/chest just feels like there’s a compression band pulling everything in. I took a hot shower hoping it would help my back but it didn’t. I can only takes deep breathes in every once in awhile. I’m healthy, I’m vegetarian, I do a lot of walking I don’t know what it could be. I’m thinking maybe my bed is hurting my back which is connected to the muscles in the front just making hard to breathe I really don’t know