Thank you for your question
If you want to delay a period it is best to take the entire packet without the seven day break rather than just taking three or four tablets . it is common to not get a bleed with pills each time you have a break. You can start your new packet (discard the one which you took three pills) within seven days of your last tablet whether or not you have a bleed. If you extend your pill free interval more than seven days you risk getting
pregnant in the new cycle. You will then need to use condoms for the first seven days and also seek advice regarding emergency contraception if you had unprotected sex in the pill free interval.
If you are still unsure please see your gynaecologist. You may wish to have a urine
pregnancy test if your pill taking has been erratic and you have been mixing packets to prepone or delay your bleeds .
Best wishes