...and I know everyone is going to say "take her to the vet" but I simply and honestly do not have the money to do so right now, I do not work in the summer. Here's the background:

We went on vacation a few weeks ago and left the dog at home, the neighbor was to come over 3 times a day to let her out and feed her. We came home and she seemed fine. (Still seems fine other than the rash.)

I gave her a bath and noticed a small patch of scabby bumps, probably the size of 2 quarters, on her back. I applied neosporin and gave her benadryl. In the week since the patch has gotten larger and she seems itchier. I did check her all over for fleas but she didn't have any and honestly she is on Sentinel. At that time I applied aloe vera gel and she seemed to get some relief from that.

The scabs are small little flecks, in patches, and her skin seems slightly darker where they are. Any ideas as to what this is and what I can do for it at home would be appreciated!
she is a miniature schnauzer