why do I pee so much on my period?
It is a common symptom of a being on your menstrual cycle. I can tell you I have that symptom right now at work grr.
maybe you drink more water....
Some women retain more water during their cycle and tend to urinate more because of it. Normally it is only the first day or two. Do you bloat? If so, you are probably holding extra water during your cycle.
It's water retention. I had a period for 40 years and had that issue every month.