Foxtrot,
I wish you well. It's probably obvious to you by now but if it's not then I offer this small bit of advice which mirrors what Fatparrot wrote: It's a waste of precious energy to worry about the unknown. Fear and worry, while understandable, are counterproductive if this thing ends up being malignant.
Chances are it will be a benign. If this is the case then rejoice and give thanks for your good fortune. If not, then busy yourself with researching the "best of the best" doctors in your area. From personal experience, the best doctors are those that will spend however much time with you it takes to make you fully informed. The best doctors acknowledge that they do not know everything and are not threatened by including another, more knowledgeable doctor, in your care. Get educated about the treatment options. There will probably be several and ultimately you are the boss. Fortify your body with foods that maintain overall good health beginning today! Get proper amounts of rest and exercise.
In either case I urge you to recognize the pearls dropped in your lap during such times and give thanks. If there are but a couple of words in this thread that have helped you in some small way please thank the Lord. With or without malignancy you will be richly rewarded by doing this.
In everything you do, with every person, fill your heart with love. And, please keep this group informed as to your outcome with the biopsy. No matter what, realize there is an enormous amount of love in this community just waiting to lift you up.
You are in my prayers.