Thanks for the query to H.C.M. Forum.
Assuming that after oral sex
, these symptoms developed.
No doubt infection of tongue is there and it occurs within a short period after sex, so reasons may be as,
yeast infect .
Physical examination is very important in this case , so consult a physician and get his opinion with complete blood tests for STD.
Least possibly may be simple glossitis
which aggravated with irritant hot liquids.