Hi welcome to Health car magic forum.
Thanks for choosing H.C.M.Forum.
On monday you had abdominal pain, nausea, and stomach upset.
On tuesday you had rash and cleared by antihistamines.
On thursday you had low back and limbs pain.
On friday there were overall body pains.
on saturday your hands pains and there is swelling.
On sunday you had puffyness of the face, and nasal congestion, and sinus head ache.
All this is O.K. but i like to know whether you attended any doctor or not during these seven days.
It appears to be the infection of the kidneys, and needs to be treated very care fully.
I advise you to consult a nephrologist for diagnosis and treatment, it is a must and urgent.
Wishing for a quick and complete recovery.
Best regards.

Hi ! You may be having some kind of viral fever which can give rise to such symptoms. You should initially get your routine blood tests done with special reference to the platelets including a LFT, Blood Urea and Serum creatinine. In some viral fevers, fluid gets accumulated in the body cavities and that gives rise to edema and swelling every where.
Your abdominal pain and nausea could be due to serositis in the peritoneum and other intraabdominal organs.
The back pain which radiated down to your legs could be also due similar causes in the spinal cord.
Also the puffiness of your face and swellings in hands and feet could have a similar etiology.
The nasal congestion also points to such viral cause of your problem. Please consult your family physician at your earliest possible. Wish you a fast recovery.