Pulled muscle neck/back?

Well ive been geting these weird headache's almost everyday but i stress my neck and head on my computer monitor. Awhile back i figured it was a good idea to repleace my nice comfy bed with a futon or what every there called but then i started waking up and have to stretch my chest out cause it was really stiff kinda painfull when taking really deep breaths but would go right away when i worked it a little bit with a few deep breaths. Now even with my own comfy bed back i still wake up like that would it be a pulled muscle in my chest or back from sleeping on those hard bars on my side?