Smelling cancer!

Did anyone smell their cancer before diagnosis? For months I kept smelling a strong ammonia-type smell and would have prickly heat waking me in the middle of the night as well as my breast swelling. I'd ask family members if they could smell anything on me and they did not. I drank more water, changed my eating habits, but nothing stopped it. After my first lumpectomy, most of the smell had gone. After the second lumpectomy/partial mastectomy, it was completely gone. Now, 2 1/2 months post-surgery, I am starting to smell that smell again and getting quite concerned that maybe cancer is coming back somewhere. I have 9 more radiation treatments to go and finished my TC chemo in October, but was chemo resistant.