Upper back and chest pain at 14 weeks?

[genstm1980]

Hi, I'm 14 weeks pregnant and today at work I developed really uncomfortable pain in my back (upper), across my shoulders and my chest/ribs. I feel stiff and achy and it hurts when I breathe deeply, laugh or cry. I don't think I've sat or slept in an odd position and it seemed to come on throughout the day and to get worse. My blood pressure is fine, I'm not struggling for breath and I don't have any other symptoms of illness. It might not be pregnancy related at all but I vaguely remember a period of painful muscles in my first pregnancy - which I did put down to sleeping uncomfortably and so wondered if I may have been wrong then and if it IS to do with body changes/ pregnancy hormones etc. after all.
Has anyone else experienced similar and any ideas what could be the cause?
Thanks in advance.

[4getmenot]

have answered in B & S x