Hello Dee

First of all I am glad you did get a diagnosis as squamous cell carcinoma can be invasive.  It is good to get it treated early. 

Here is some information I want to give to you:

A Dermatologist Answers Questions about Topical Chemotherapy Creams

Here is the official Carac site.

Here is information we have on Aldara.

And here is another post written by a dermatologist about Aldara and Carac creams.

Only your doctor would be able to tell you why he has you using both creams at once.  Maybe you would like to get a second opinion? 

This is a quote from the Skin Cancer Foundation about treating SCC:

"The vast majority of squamous cell carcinomas are curable when identified and removed in a timely manner. Mohs micrographic surgery has the highest overall cure rate (94-99 percent) of any treatment for squamous cell carcinoma. Mohs also saves the greatest amount of healthy tissue, and appears to reduce the rate of local recurrence."

Was Mohs surgery a procedure discussed with you?  Only your doctor can tell you why he or she prescribed the treatment...I would suggest you have a conversation with your doctor about your options.  If you are not satisfied you can then get a second opinion.

I wish you the best of luck.  Thank you for your question.