You are right! the symptoms do vary in different people. But when it occurs it happens all at once. Fever along with nightsweat, nausea, and fatique happening all at once seem to give a distinct sign that this would be likely ARS.
You can't go by symptoms with ARS. There are no specific symptoms.
The rash was easy to miss as it seems to be slightly itchy but did notice red raised bumps in the arms, parts of kneesand chest areas. Even if rash is not there, all other symptoms were more visible. Felt like a light fever, headache, nightsweat, and sharp stomach pain.
looking at several websites all seem to list these symptoms as ARS. Teak can you explain to me please.
Your symptoms are not indicative to ARS. You can test 3 months post exposure to obtain a conclusive result.