Try not to panic, and check the leaflet for advice on what to do.
Everybody forgets to take their medication once in a while. One of the advantages of the combined pill is that it offers some leeway regarding missed pills. If you normally take it at a certain time, and remember to take it within 12 hours of that time, you will stay over 99% protected against pregnancies.
If it’s been over 12 hours since your missed pill, take the one you forgot as soon as you remember and then the next at the normal time (this might mean taking two on the same day). When you miss more than one, you only need to take the most recent pill you forgot. The other pills you’ve missed can be discarded.
If you miss one or more pills, you’ll need to use a barrier contraceptive for the following seven days.
Sometimes, you might need to skip your usual seven day break and ‘stack’ pill packs - it depends where in your pack your missed pill is. The leaflet that comes with your pill will have more info on this.