Haven’t gotten my period

I haven't got mine back yet either. Totally normal.
Plan B essentially forces your body to have a period, regardless of whether or not you naturally would and regardless of whether or not you've conceived.
Are you breastfeeding? If so please talk to a professional about a safe form of birth control for while breastfeeding.
Plan b is not meant to be taken frequently. I highly recommend considering other options so you don't permanently damage your body's hormone regulation.

Are you breastfeeding? If you’re breastfeeding it’s normal not to get your period. PLEASE DO NOT force your body to have a period. Plan B is meant to cause a hormonal disruption and therefore shredding of the uterus lining. It’s not an actual period. It’s meant to prevent unwanted pregnancy in emergency situations. It’s dangerous to use it for any other reason

I stopped breast feeding at 4 months , im 9 months pp now but still no period !

No I mean in the occasions I have used plan b is the only time I’ve gotten a period