I Have A Sorted Health Past, But Currently I Go

I have a sorted health past, but currently I go through phases. One moment I'm generally feeling okay....not great but various symptoms are not rearing any serious complaints. But then I have 3-4 days of total body pain. Serious, cramping all over my body for hours with no relief. Totally cripleing need to use a walker to get to bathroom, involuntary screaming, debilitating. I am careful about dehydration and vitamin deficiencies. Not that I'm a lab but I'm not a doctor......then after a day or so of this my muscles are so sore and especially in my legs I have involuntary palpitations. Though my arms have the same weakness. So when I'm standing my legs give out. Coordinating with this is my skin which is itchy, and hurts this is all over my body. I also have on my left side stomach a throb that goes down to my personal parts. I'm so miserable that until today I couldn't even use my iPad to symptom check. I don't want to go to the hospital cause it so extreme,but when I'm in the throes of this (I'm alone) it's not pleasant to be around me. Also when i feel that poorly it's hard to convey coherently. I hope that you understand and can help me.