So I was with a girl on Thursday. We kissed, performed Oral on each other with no condoms and had sex with condom. That Sunday night I began having a bad sore throat mostly on my left side. I woke up with bad sore throat, swollen lymph bodes, and white spots in the back of throat, maybe like 3 total. I went to doctor on Tuesday and she didn't seem too concerned, said it's probably strep or maybe mono. No other symptoms, maybe a headache. She gave me antibiotics and did a throat culture. Today is Thursday and my throat is feeling a little better. But I was convinced it was strep but they called today and said it was negative. Should I be worried about it being something more serious?