Hello! I have the same pea size (or a bit smaller) lump in my tongue. I'm on day 9 of 10 of antibiotics for sinus infection. The lump showed up last Wed night. I thought I had one of those "acid bumps" as I call them and went to look in the mirror. I can't really see it but I can feel it and it seems closer to the bottom of my tongue. I'm very nervous about this and going to see the dentist next Wednesday. When it showed up I was still battling a very strong sinus infection. Was hoping the two were connected but the antibiotic doesn't seem to be affecting the bump at all. Any advice?