I can definitely relate to the ammonia smell. I was diagnosed in 2022 with breast cancer. The months before my diagnosis I kept smelling ammonia and I would get a ringing in my ear that sounded almost like Morse code constantly. I went through chemotherapy and a DMX and both the smell and sound in my ear stopped. No doctor I spoke with about it seemed concerned at all about these symptoms and I would get the response from each “hmmm, I’ve never heard of that happening, I’m not sure what that could be” and that’s where the conversation about it would end. Fast forward to the start of January 2025, I’ve been NED for about two years and now I’m getting that smell again, more and more. I’ve been so fatigued, I have swollen lymph nodes, blurry vision in one eye and lower back and neck pain…a bunch more symptoms too that all seem totally unrelated to another. I saw my primary care physician who drew blood and ordered scans (my appt is for Feb 3) I went to the ER and she tested me for virus and also took blood. My MCHC was a little low and my BUN a little high but that’s all that showed up. The ER Dr also couldn’t explain the ammonia smell or any other symptoms. She gave me my lab reports and told me to follow up with my doctor. I’m hoping you still see these posts even though it’s been almost 6 years because I’m very curious as to what you found out.