Magnesium Glycinate - Does it affect your cycle?

I’ve been taking magnesium glycinate for anxiety since August - 400 mg. I’ve noticed that I’ve ovulated (based on ewcm) very late the past couple months, with Sept. starting 13 days after the end of my period and Oct. starting 16 days after the end of my period. Usually, I ovulate with ewcm between 2-10 days after the last day of my period. Has this happened before for anyone else? Is this normal? I’m not sure if I should be concerned about this.

Note: I was on BC for like 3 days in the beginning of October, I stopped because of severe anxiety and depression symptoms. I also have had a stressful grad school semester.