i know it's a truly frightening thing you are going through, but just go through with the blood work before you make any conclusions.
i had a huge mass removed from my ovary that the drs. were convinced was ovarian cancer. after they biopsied it, they found it was benign. i understand the dark place you are talking about. for about 10-12 years i have recurring small lumps; sometimes 3 and 4 at a time, also painful and warm to the touch. when i would stretch my skin you could see them. it scared the hell out of me, especially after having my cancer scare. one doctor finally figured out it was just folliculitis. my glands would clog up causing ingrown hairs. they tend to come more often when i am run down, or under stress.
again, i am in no way, medical professional, but there could be a very simple explanation. keep us posted, and i'll keep you in my thoughts!