Always feeling pain in my shoulder blade?

I am not sure what to do or what could be wrong with my shoulder blade very often I will get pain in my right scapula and there is usually nothing I can do about it I just have to wait until it goes away on its own but I'm not sure why I'm having pain in my shoulder blade I got in a car accident back in 2014 and when I got in the accident I got a really bad whiplash and really bad pain in my shoulder blade that I couldn't even lie down it's usually never that bad but since then it seems like there's always a light stabbing pain in my shoulder blade my shoulder doesn't hurt when I move it or rotate it but when I get the pain in my shoulder blade it last almost all day even when I'm sitting on the couch sometimes so I don't know what this could be and I don't have money to go to a chiropractor