Chemotherapy - physical impact on family?

Hi - this is a weird question but I want to know if anyone else has ever experienced it.  My husband has throat cancer and has had two rounds of chemotherapy.  Each treatment is 6 hours, two days in a row.  I sit with him in the treatment room, where there are probably 20-30 other patients receiving treatment. 

Both my husband and I experience slight dizziness and a pressure type feeling in our heads - very much like the feeling you get when on a plane and the cabin pressure changes.  Our son visited during treatment and he commented on feeling the same thing - having no idea that my husband and I felt this weird "pressure" feeling as well.  After treatment, my husband has the expected side effects, one of which is a very unusual and somewhat bad smell with urine and bm - 48 to 72 hours after treatment.  Totally normal.  But here's the thing - I also have the same exact smell in my urine and bm for the same time frame.  It's not from food we may be eating - my husband is tube feeding and I am of course not.  It's not a "leftover" smell, we aren't even using the same bathroom.  The second round of chemo caused both of our symptoms I describe to be equally worse than the first time.  What is going on?   Has anyone else experienced this? 

Wow, you get to sit with you husband?  I was told that it was HIS treatment NOT mine and I was not allowed in the room while he receives his tx.  Oh well, I have used the time to get some errands done and sometimes go to lunch with friends.  That's important too.  But, as far as you symptoms go they are strange.  My husband does get a strange taste in his mouth and smells strange things too.  HE doesn't have the smell himself on him.  No one seems to be able to explain this to him.  Maybe it is an odor of some of the other 20-30 patients in the room that has permiated your sinuses?  When I worked in hospitals in a clinical role I would sometimes get that and it was almost impossible to get rid of.