Haven’t had my period??

Holly

Hey ladies! My name is Holly , I am 23 years old and married :) so I’ve been a bit stressed out .. my last period was around Oct 28-30 and I haven’t had a period yet .. I also stopped birth control about 3 and half weeks ago. I have had terrible breast pain but that’s it no cramping no nothing , also I took a pregnancy test and it said “not pregnant” ? What should I do.