I went for a 7 hous hike in the snow on January 21st carrying a medium weight backpack. Probably I tightened its left stripe more than the right. That night I slept on a bed wich has no spring matress, only a table below. Since the day after that hike I've had true pains in my back just around my left shoulder-blade. I've been taken Ibuprophen, Paracetamol and Myolastan at nights. I'm also eating many bananas (Potasium), putting IR light or heat to the back and receiving massages with anti-inflammatory gel. The pain near the column has disappeared but I still has it to the left of my neck, the sternocleidomastoid is still stiff. Even the shoulder and biceps were affected though they're fine now. I've also tried to use my computer less than before during this week.
Any advices