I Hurt Constantly, Sometimes More Than Other Times And In

I hurt constantly, sometimes more than other times and in many ways from sharp to almost like I'm bruised in certain places in my muscles, everywhere my body moves. It's all over but not all at the same time. Sometimes my back, others my legs, sometimes it's here and there. The last doctor I seen said it was from being depressed. But after 3 different antidepressants I stopped seeing her cause she was convinced it was depression and I am not. That was a year ago I am now to the point I cannot function, even a load of laundry seems too much some days. I have psorisis on about 35-40% of my body. Steriods help only while i was taking them, when i stop them it comes back with vengence! I have other symptoms, different things i woyldnt think dirrectly relate but ? Idon't know what to do, my life is falling it pieces because of it and I'm at the point suicide seems my only option. Im only 31 why am i feeling this way? What could this be? I'm desperate! Please help!