gee Gin,
Hard to know. But, I tell ya, I have had the strangest body things come and go and stay around and feel like yuck and etc....
At my chemo introduction, the nurses told me that in the future and long after treatment had passed, that I would have strange things happen with my body (it's just a shell) and that I could blame all weird happenings on the chemo I was about to receive.
So, if nothing shakes out for you, maybe you can blame it on the chemo.
Cindi o'h