My cat has semi large lumps on the back of his tongue.?

Originally my cat had a swollen mouth and the vet said it was a flea Allergy. They gave him prednisone & revolution. it seemed to get Better. We just moved to a new house with other pets... and now my cat has white and red lumps (semi large) all the way in back of his tongue (2 of them) . I cant get to the vet til I paid on July 2nd. Please tell me its not serious! He is almost 10 years old. He still eats and drinks and seems fine. The drooling started again (like he had with the flea allergy). Other than he seems ok, Yet, I'm freaking out! I can't get him to the vet til July 2nd when I get paid!