I was getting the shopping out of the boot earlier, lifted a crate of water out with one hand and felt a horrible sensation in the muscle round my shoulder.
It sort of 'popped' then I felt a burning sensation, followed by agony.
I've tried ice, heat, ibuprofen and co-codamol (30/500 that I'm prescribed for another problem) but nothing is touching it.
I went to put some voltarol gel on the area but touching it is agony.
It's been 7 hours now and I can't move my arm properly without pain shooting around the area.
Anyone got any ideas? I'm going to ring the GP in the morning for an appointment but I am not looking forward to sleeping tonight.
I haven't even been able to get pyjamas on because I can't lift my arm 
Please tell me it's nothing serious (I know you can't, but anyway...)