Thank you for your question.
It would be wise to repeat the
pregnancy test after a week if your periods have still not started. I presume you stopped the pill because you wish to get
pregnant. Sometimes women who have irregular periods find it hard to get pregnant spontaneously. You may wish to see a gynaecologist specialising in fertility treatment sooner rather than later because you may spend a long time trying and getting disappointed if your cycle is irregular.
best wishes