Help, I am so worried about my girl.....:(

[Dorothy39]

Greyhoundgirl, I don't know.

Jenny may have simply had a reaction to a "bite" ( insect, ? bee?)

As far as cysts, no, I don't think a cyst, left un detected/treated, would go away on its own. But, I have no experience with cysts on dogs either.

Cancer? Again, a NO, lumps and bumps that are cancerous will grow, and , spread .

I am wondering about this "bump" on your Jenny!!!!

I am glad that you have noticed it is smaller!

[GreyhoundGirl]

I'm really . None of my dogs have had this sort of things before. ( Phew ! ) It's an odd-ball. I'm pretty sure it IS smaller, though....

Does anyone else have any ideas as to what it might be?

[Pembroke_Corgi]

Does anyone else have any ideas as to what it might be?

The only way to know for sure is to have a vet examine it. Ask around, I'm sure you can find a vet who is more affordable than your current one. I would take her to the vet.