Is this possibly a torn muscle?

I put this in all the healthcare sections and nobody had answers so I figured I'd turn to the athletes! :)

ok so I play hockey. I want full speed into the corner with someone and got hit from behind. I can't describe how I fell but my shoulder went into the boards and under me. I went back out the next shift lined up for a face off and got off after 15 seconds because it hurt.

i didn't lost any movement but it hurt like a mother when I just let my arm hang at my side or I pulled it back.

literally for a week it felt the same. at practice 2 days later it hurt just to put my shoulder pads on. like a bad bruise would feel.

after 2 weeks it finally started feeling better but there was still some movements that hurt it and a dull pain when I had my shoulder pads on.

oh and I can't sleep on that side AT ALL!

that was 3.5 weeks ago. it's most better but I can still feel pain whenever I lay on that side or pull my arm back or try to like scratch my back if that makes sense. and playing hockey still hurts it little.

is that just a bad pulled muscle? I feel like I would know right away for sure and have no doubts if it was a tear but I don't know...

thanks!