That's probably not too long but I would agree that you in all probability, have cancer. Your numbers jumped pretty quickly, as did mine (9.4 to 18 in three months). Count on having a biopsy (demand anesthesia, you'll thank me later). If I could do it all over again, I think addressing cancer sooner might help preserve lymph structures and crucial nerves by intervening while your margins are negative (cancer contained to the gland and not metastasis to the surrounding bones, etc). On a personal note, I would not have chosen any facility other than Mayo for my cancer treatment. I am 61 years old. Good luck to you!