Super Late period?

Hi I am asking for a friend

Is this normal? I know after stopping birth control that your periods can become irregular for sometimes up to a year. I stopped birth control in November and had two regular periods (on time and lasting 5-7 days) and then was expecting my period again but now it has been late for over 3 weeks. I just want to know if anyone has experienced anything similar when stopping birth control and if they did skip a period, how long until the next one came back? I’ve taken pregnancy test they are all negative no symptoms. Also don’t feel stressed not much has changed I work from home with 1 child and I’ve had more “me” time to de stress than ever. We aren’t trying but whatever happens happens so we haven’t been using any other form of bc. No PCOs. Not sure I’ve only been late before when I was pregnant

It is normal. Bodies get thrown out or whack when birth control is stopped.