thanks for your query.
If you have been sexually active after coming off the pill, then there are chances of pregnancy
If not, there is no possibility of being pregnant.
ALso, after discontinuing hormonal
contraceptives after long term use, it takes some months, generally a couple of months, to resume normal periods.
At times, a condition called post pill amenorrhoea results, and it takes a longer time for women to resume their periods.
Please consult your health care provider to be sure of the diagnosis.