Will exercise help my period?

For the last 6 months, I’ve had very irregular periods. Went to the doctor a few days ago and they ran a bunch of tests. Everything came back normal except for one of the test levels were a little low and they said it was probably just due to stress so I’m trying to figure out ways to reduce my stress and regulate my periods again. I would like to start walking/running on a daily basis again. Will that type of exercise help to regulate my period or make it worse? I’ve heard that exercising can cause your period to stop all together for a period of time.