Child is SICK, please help!

Since last Friday, my 6 y.o. son has had fever of up to 103.8 at nights and up to 102 during the days (flactuating). Fever was accompanied by coughing and some sore throat.
He also complained of a stomack ache on the first day (on the right side).
He was constipated, and I gave him an enema, and he had a BM (greenish brown dark).
Stomack pain was gone after that. A day ago, he had one Diarhhea movement and had temporary nausea.
He had a revenous appetite yesterday and today (wanting eggs, protein, etc).
This morning, fever was gone for a while and then returned to 100 degrees.
I took him to a doctor, doctor checked him out, said that could be viral. She wasn't sure, but took strep culture.

Tonight around 6pm, his fever came back again, it's about 103 now. He's been complaining of a stomach pain again (lower part). He hasn't had a BM all day since diarhhea last night, so he is probably constipated. He has also been complaining of light sensitivity (only in the evenings when fever is high).
He sleeps ok through the night, occasionally waking up thirsty, or coughing and complaining of sore throat when coughing.

To rewind back two weeks.... I took him to a chiropractor and he suspected worms (maybe pinworms). So he suggested for me to give my son zymex (digestive with bromelain, etc) to digest worms in the intestinal tract. I've been giving this to my son for a week prior to him getting sick. Plus some vitamins.

My son does look like he has worms, because he grinds his teeth at night, he is fidgetty, dark circles under eyes, etc. I temporarily stopped giving him the digestive thing once he got sick with this illness...

The same chiropractor suggested to give my son CONGAPLEX for his sickness (Congaplex is for people who have congestion due to an infection -- a cold or a flu or any other kind of infection. It is Made From Bovine Thymus Cytosol Extract, Calcium Lactate, Magnesium Citrate, And Ribonucleic Acid.)
Anyway, I've been giving this to my son, I don't know if it's doing anything yet.

My questions...
any suggestions on what my son may have and what's causing this?
What natural remedies would you suggest to try?
What else my be causing this illness (parasites, intestinal infection, etc??)
I am worried because he usually gets over his sicknesses within 2-3 days (fever part)... This one has been 5 days already.

I have these things at home...
Colloidal Silver , olive leaf extract (capsules), oregano oil, zapper, nucleotides, vitamin C liquid, Boiron's beladonna, eldelberry tea, p'au d'arco tea, Food grade peroxide 3%, Sambucol, probiotics, tea tree oil, eucolyptis oil, etc...
thanks for your help.
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