it means you have strep. it may be early signs of it, go to the doctor soon.

also if your toung is white with red spots, or red with white spots this is a definate sign of strep

The marks in the back of the throat that you see are probably "exudates" and represent patches of bacterial growth.

it is important that you see your physician for proper diagnosis and treatment. More than likely, a simple antibiotic will do. Occasionally, those marks can represent something more serious and potentially dangerous to your health such as medical illnesses or cancer.