Really bad knot in my back!

I've been trying to stretch it, my mom told to go lean up against the corner of a wall and rock back and forth to try and get it out.

I tried everything and it's still not going away, now it's worse, I seriously can't move properly so i'm thinking of spending the rest of the day in bed, even the slightest move makes me wanna cringe in pain.

I don't know whether anything on here will help:

Link to thread

I know I'm a little late here...but have you ever tried hydro massage??

It's about $1 a minute here - we have one in the mall - Chill in that puppy for 30 minutes and I promise, all your aches and pains will melt away.....

Hot baths and positive thinking helps my back problems.
I suffer from sciatica. It's been okay for a few weeks now.
You don't know how important your back is until it keeps you from getting around.