Hello Mr. Christopher.
Thank you for your query at DoctorSpring.com.
You seem to be recovering from a viral infection. The initial diarrhea and feeling light headed were the first symptoms. Chills, fatigue and sweating all indicate the same.
Viral infections are notorious for the fatigue that accompanies them. It also tends to last for quite some time, a week or two.
If you have any swollen lymph nodes, then this could be Infectious Mononucleiosis.
However, determining the specific causative virus is not really required as treatment is only supportive.
I would suggest that you take a Tylenol, thrice daily, for 3 days. This should help with your symptoms, as sweating indicates a mild fever. Take adequate rest during this period and avoid over exertion.
All in all, nothing to worry as you are well on your way to a complete recovery.
I hope this was helpful. Feel free to ask queries.