cat has a lump

Question
Okay I understand that you are not a vet so please I am just a middle class person working to make it, and I took in a stray cat, I already had a male Blue Point Siamese. He is neutered. So my first assumption was that maybe she went out side and got impregnated. But her nipples are not getting bigger and and she has no lumps on or in her stomach area that I can feel. I am going to get her to the vet ASAP ( which will be around Fri. but I am just so worried) have you ever heard anything like that? They places feel like kinda like a small unborn kitten like   1  1/2 to 2 inches length and 1 inch in width. She shows no tenderness when I touch them. My last comment I PROMISE she has just gotten over a cold from the weather. So has my other cat.

Answer
Sincere apologies for the delayed response.

I am sorry but by your description I can tell you have found a lump(s) but not what location it is in.  Are these near the nipples?  If so without her being pregnant I would be concerned with possible mammary cancer.  But I am unsure if this is where you found them.  If you could describe where they are I will try to provide further information.  Thanks so very much and again apologies for the delay.