Missed period

Okay so seems like I’m about to miss my February period. I am not on birth control, and I’ve been taking my antidepressants for more than a year. I did go ahead and take a pregnancy test yesterday and it was negative. Any other reasons I could be skipping a period besides pregnancy? Should I be worried about my health? I’ve had this happen before in 2019. Same month. It was the year I discovered my anxiety issue. My doctors assumed the missed period was because of stress(I was going throughhh it that year). I was going through a lot right around the time my period was supposed to come this month but since this is the second time it has happened, I don’t want to automatically write it off as a stress issue...

Any advise would help. Thanks in advance.