The symptoms you are having (sore throat
with white spots
, swollen glands) could be related to a complication of flu or common cold
, most probably a tonsillitis
To define whether it is bacterial or fungal in origin, I'd suggest to do culture of throat (especially of the white spots) for bacteria and fungi.
Usually, the mono-spot testing is able to detect the mono antibodies within 2 to 9 weeks after the symptoms appear.
All the best!