You clearly have a garden variety upper respiratory infection, not sexually acquired -- a virus,
strep, or both. The timing is right
for a non-STD infection from your sex partner, especially if there was kissing in addition to the oral sex.
This is your second question on the forum in 3 weeks. Just a word of warning: MedHelp permits a maximum of 2 questions every 6 months on the professionally moderated forums (see Terms and Conditions).