Missed 2 periods coming off b.c?

I haven't had a period since the end of december. My husband had a vasectomy in october. He hasn't had his sperm checked to make sure it worked. I came off the pill bc I was a total miserable monster. Has anyone else missed 2 periods coming off the pill? I was on ortho tricyclen lo. I missed one when I came off them before but never 2.