Late period

I breastfed my son who just turned 1 on Thanksgiving... we quit breastfeeding 3 days after he turned 1.

I was on the mini pill until Nov. when I stopped taking it. (I have not had a period in 2 years and wanted to have one.)

I have no withdrawal bleed or spotting after starting or stopping the BC.

I got my first period Dec 1st and had a normal 7 day period.

I was expecting to get my period Jan 1st but I have still not started my period. I'm not sure what is normal after BC and how long it can take to regulate cycles again. Can anyone help me out with what to expect?

I have Endometriosis but have always had monthly periods.

My husband and I do not use protection but it is very unlikely I'm pregnant ....