My Mother , Age 88, Had A Strange Experience Today.

My mother , age 88, had a strange experience today. One of her legs felt like it had all of the blood accumulated from her body -all of a sudden so that her shoe felt like it was way too small on her foot. (this was from the knee down)
Then she had to use the bathroom and had diarrhea, and her leg symptoms went away and so did her diarrhea. She was afraid to go on her usual walk, but decided to go anyway, and has been symptom free since. Could this have been a mini stroke? I asked if she had any pain in any other place-she said no. She has recently had her blood pressure medicine increased.