I woke up with a big lump on my shoulder and it really hurts what should i do?

are you stressing out because it could be tension on your muscles. you'll need someone to mage you and use some bengay or muscle cream. Also it could be that you slept wrong and that usually goes away after a couple days - it hurts but you can also do the same thing - have someone mage it. If it looks like a big pimple and its hot it could be an abcess and you would need to put very very very hot (the most you can take) towel over it, and do that over and over - but if its still there for a couple days, go to the doctor - he'll have to pop it and disinfect it.