I have had depression off and on for15 years. Now have lower back pain and pain at top of spine around shoulders and neck.The pain is with me most of the time,however nothing shows on x ray. I have good days and bad but never feeling that well. The rest of my joints are o.k. apart from hips and knee joints which play up sometimes. Can anti depression medication cause these symtoms and do I have fibromyalgia or just aches and pains?