I freaked out too! Dont worry.
I called the vet (it was a weekday) and said we needed to come in right away, it was an emergency!!!
I think they found it a little funny when I showed up, :lol-sign:
They checked all sorts of things, bones in the face, teeth, gums, they looked for bite marks... in the end he wasnt sure if it was a slight infection or if he had maybe fallen (or been pushed by an evil sister) off the bed and banged his head. But all was well, the swelling went down in a few days with the meds.
I will be sending vibes for you and Mama, that it is something equally as minor!