My primary symptom is pain on my left hip/flank area
Probably the symptoms are related to a viral infection.
Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice.
Your symptoms seem to be related to a viral infection.
I recommend using an over the counter medication to treat diarrhea such as Imodium.
I also recommend to use daily probiotics.
The pain on the hip radiating to the back can be related to a muscular pain.
I recommend to use an anti-inflammatory medication such as Ibuprofen 400 mg three tablets a day.
I suggest to drink liquids and rest.
I also suggest to eat small portions of bland food which is easy to be digested.
Hope I have answered your query. Let me know if I can assist you further.