Yes, it's an infrequent, but possible side effect - https://www.webmd.com/drugs/2/drug-16321/norethindrone-contraceptive-oral/details/list-sideeffects If your blood pressure has gone up, and it's nearing dangerous levels, please work with your doctor on this. There are other treatments for endo.
There is also a precaution if you have high blood pressure - https://www.mayoclinic.org/drugs-supplements/norethindrone-oral-route/before-using/drg-20137986
This is a study that followed women taking it for 5 years - it's been deemed safe for at least that long - https://www.sciencedirect.com/science/article/pii/S0301211517301471
I hope this helps!