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Just saw your question. You mentioned you can't see it, so I'm presumming a photo sent, would not assist us in diagnosing it?
While it is much too much of a broad stroke to blame the cause of the problem you have with an accidental tongue bit, I must say that is my very first and foremost thought. It happens frequently. Many times, even while asleep, when we're unaware of having bitten the tongue. Do you have any more information to shed - with regard to your tongue and it's pain?
Perhaps, you may be best to take Ibuprofen or Tylenol, as needed, and come Monday, see your Dentist for further evaluation - just to be on the safe side. I'll await to hear back more from you - OK?
How long have you had the sore spot? And, might a somewhat sharp tooth be nearby the area?
What you are suggesting is likely the best call, especially with no real pain per se. The only exception might be if the lump is brand new, getting larger, or begins to hurt or change colors. These might be valid reasons to go in to your Dentist more quickly. But it sounds like you are "on top of things"!
Lastly, often times, if given a week or so - it may well just GO AWAY!!!
I certainly do wish you the best of luck.
*PS: Please 'do' let me know if I can assist any further - OK?