Hello, this to me does not sound like PTSD. Typically PTSD is caused from some form of mental trauma. I think you should concider that either the cancer that your mom had has spread or the medication is too high or maybe she has even had a stroke. A suggestion would be possibly go to WebMD.com and there is an area where you can go under symptions and put in the signs. It can give u a list of ideas of what could be happening. Once you do this it is very possible that these signs will offer u a logical explaination. Hope this helps! Best wishes!!!
It could well be but also it could be the drugs she is on.... most powerful drugs have side effects some of them as you describe, ask her Doctor and see what he says,is she taking a few drugs as sometimes they interact with each other, and yes Doctors do miss this fact, you can ask the local drug store Pharmacist about drug interactions and even google it your self. Good luck hope she does okay its early days she will feel better soon I hope, let us know .