squamous cell skin cancer

I am a 33 year old male and just recently noticed a brown spot about one inch below my waist. It has been there for ten years because I remember seeing it and I just thought that it was a mole. Last week I was paying attention to my pubic area because I had a seborrheic keratosis that was itching and noticed that this spot looked bigger than what it did ten years ago. The dermatologist biopsied it and it came back squamous cell. I do not know if he removed the mole by a shave or excision technique. Either way he removed the mole. He said my treatment was Aldara cream for twelve treatments and that I needed to come back in a month. I was confused so I called back and the nurse said that I caught it early and that the cream would suffice and that if it was invasive I would get complete excision or be referred to a specialist. My question is if this is an appropriate method for my diagnosis? If the cancer was deep enough then exicision would be more appropriate correct? Also, is the pubic area anything to be concerned with since it is an uncommon area for skin cancer? The only reason that I can think of it not being in a non-sun exposed area is genetics. Any input would be appreciated as this is worrying me to death and I am losing sleep.