seems like when we get in a argument and I finally tell her I don't want to discuss it anymore....after a few minutes she will ask if I forgive her or say she is sorry...if I tell her I still don't want to discuss it right now....she then will every 5 to 10 minutes tell me sorry again. Question is how can she recall that even after 10/15 minutes but not recall other things after 2/3 minutes. could this also be caused by her medicine
She is remembering your being upset with her (even if you weren't, she thought you were--I feel that way with my wife quite often and feeling guilty for the same reason). I think your mother may be doing the same thing, just trying to make amends. Think about children; they quickly apologize if they think they made their parent angry or if they did something wrong, and they usually don't let it go until the parent reassures them.
Don't fret over it or discuss it further, just hug her and tell her its ok--even if that's a fiblet--and that you love her, and that may end it (it works with me). Worth a try.....
It's not so much that I remember the issue or what caused it, it's more that I'm still aware of us being out of sorts. It's as though I feel the emotion in the air but I can't remember why it is there.
What I can tell you is she's not faking and she's not trying to upset you on purpose.
Hope this helps.