You must get your blood tests done .
Normally after 6 weeks of exposure the symptoms of fever
etc arises but it will be better that you get your tests done.
You can get done a ENT Consultation so that if required proper antibiotics can be given.and doctor can see for any ulcer or any other findings which is not evident to you .
Do not worry it could be just throat infection
which occurred and is lingering on.
In doubt do reply