How to get a second opinion about moles and skin cancer...?

I just went to the dermatologist a couple of weeks ago and the nurse practitioner noticed that I need to have a couple of moles removed. She showed the dermatologist and she said that they need to cut one or two of these moles out...Subsequently, I just read some reviews about the dermatologist that I went to and some are not favorable (mostly in the price hospitality of her bedside manner); one even mentioned her ability to diagnose what was wrong with me - other people however said that she does a great job. Who do I believe? In essence, should I go to my appointment in a couple of days and have these removed as planned and hope for the best or should I have a second opinion - in which case, how can I get a second opinion if this dermatologist removes the moles? Is there a way for another dermatologist to tell if these moles were cancerous? Or is there a way for the second opinion doctor to tell if the removed moles were melanomas? Please let me know if you have any suggestions...I am somewhat of an iotraphobiac - I hate going to doctors and frankly they scare me, but thinking that I might have cancer scares me much more. I just want to be sure that I have the right diagnosis, but I can't afford to pay a ton of money to find out. Please help.