Hi, I am sorry you are feeling like this. There are a few possible reasons for your symptoms
1. Viral infection: These can often present with a multitude of symptoms that are often non specific. Viral infections usually improve on their own and do not need antibiotics
2. Urinary tract
infection: Pain in the lower back with chills
could be due to a urinary infection. The first thing there is to get a urine analysis looking for white cells and bacteria. If you have an infection you may need oral or intravenouls antibiotics depending on the severity of the infection
At this time, I would recommend
1. Plenty of fluids to keep yourself hydrated
2. Get a urine analysis- urine microscopy with culture to rule out an infection
3. Since urinary infection particularly if it involves the kidneys is quite a serious condition if not treated promptly, I would recommend you also see a primary care
doctor as soon as possible to rule out infection.
Please let me know if that was helpful. Thanks!