Can yeast infection stop menstruation? I haven't menstruated in 5 months. I ovulate constantly (gas, bloating, cramps, cervical mucus- stretchy).

Amenorrhea. If you began to menstruate and then stopped this is known as secondary amenorrhea and you should definitely be seen and thoroughly evaluated by a gynecologist. Something sounds seriously wrong and cannot be successfully diagnosed long-distance over the internet. This is not due to yeast infection, and the other symptoms you describe may or may not be part of this. See a doctor. Good luck.