good!
If your dog really does have a bump like you discribed and it is bothering her then she needs to go to the vet. If you are "too busy" to make a phone call for her to go to the vet, then maybe you are too busy to own a dog...
You said that you "couldn't get a hold of him" which implies that you called and there was no answer, and your going back on what you say. I hope I'm not sounding rude, but I'm concerned for the dog and I'm a little confused by your "truths".
idk - you guys are friends or something, but maybe "12 and a half" is too young to post on a public forum like this