I think any concerns you have are best addressed by a health professional - a different one if those you are seeing might overlook stuff (everyone tends to focus on one particular area, so won't necessarily see other stuff, you know?)
I reckon if you feel something's not right, then you're probably right, you just need some professional guidance to get to the bottom of it. It may not be anything serious, but it's just better to know.
Really, after everything she's been through, this might just be the way she's dealing with it. I dunno and have nothing actually helpful to offer.