Suggest Therapy For Allergy Causing Excessive Sneezing

I was sneezing A LOT yesterday and then during lunch I had accidentally drinken one of my friend's drinks who had just gotten rid of their mono. I kissed my boyfriend goodbye after school as well. Later that night, my throat was sore and that's all. Today, my throat was sore (until I drank some tea and had ibuprofen). My nose is slightly stuffy/runny, but not very much. My boyfriend has called me and said that he is EXTREMELY (likely overexxagerating) sick with fever and that he has gone to the nurse.

I've done research and it has said that it takes 4-6 weeks to show symptoms of mono after contracting it, is this correct or could my boyfriend and I possibly have mono?

PS. I do not feel tired, I still eat regularly, and I sometimes get allergies during Spring Season due to pollen...so I think it might be allergies? But that doesn't explain why my boyfriend is now sick as well.