I have been showing symptoms of strep, for about two months now. Initially, they did a rapid strep test about 4 days after i was showing the symptoms and it came back negative for strep. I was & still am, noticing white lines on the inside of my cheeks, looks like spider veins throughout my mouth, red tonsils, and small flesh colored bumps on the back of my throat. every morning i've been having a bad case of post nasal drip, and it feels like i always need to clear my throat. the doctor prescribed amoxicillin, which didn't do anything, i went back about a month later, to be retested by a different doctor, who did a swab test and told me that I tested positive for Strep A. She prescribed me a different antibiotic that seemed to slightly improve my throat, but still not 100%. it is now 2 months without any real improvements. I'm not sure if I should be concerned this could be something else, Since i did have unprotected sex, i wouldn't necessarily say i did oral because i only licked it. But, it was still in my mouth. The symptons happened the day after. I'm concerned this could be STD related, or a super strain of strep. is it possible to have a throat infection for months?