Forgetting periods

So I use this app to track my periods but sometimes I forget to log. I can’t remember if I had my period in October. I remember September because I was on it for my boyfriend’s birthday. I was feeling moody the other day so I thought I’d log on and see if I was starting soon. It said my period was late, and I honestly couldn’t remember if I had it and never logged it or if I never had it. I’ve been stressed over moving and some other things and then it just made me more stressed that I couldn’t remember if I had it or not. Do any of you forget your periods? My boyfriend was like “how could you not remember” but it’s so regular and mundane that unless it’s ruining an event or on a holiday I don’t think of it.