I encourage you to shop around for a dermatologist you trust.
This is very good advice. Seems obvious, but there are a lot of surprisingly bad ones out there (I am on #4). I too have had to point spots out that were indeed bcc's but the dermatologist overlooked them. Also I have a 4 inch frankenstein scar on my right forearm that is mindblowingly big and was pretty poorly stitched, especially considering the size of the bcc.
I've also tried Aldara, the chemo cream stuff, and one can have no reaction or a complete systemic one (guess which I had?). When I told my derm she scratched her head, but it cost me 2 $$ trips to an ENT doctor to rule out lymphoma! It was sad that I knew more about what was happening than my doctors!!

So, it is potentially serious stuff, and you do want to trust the one who's taking care of you.

Also, if they think freezing is a good approach to something that is clearly "something" but hasn't been biopsied, run for the hills. I have had two bcc's frozen off (I guess it was for my convenience, or was it theirs?? at $80 per spray) that returned and became a much larger problem than they needed to be had they been treated right the first time.

Wow, I didn't know I had a rant in me today..!