It's recommended that you take your pills at a similar time daily. But, if you miss the hour, you should take the medication as soon as you remember. If you missed yesterday’s pill, take 2 tablets today (to cover the missed day and today).
The same case applies to missing 2 days. Take 2 tablets on day three (the day you realized you missed the 2 previous days) and take 2 tablets on day four (the day after you realized you missed 2 days) to compensate for the missed pills. However, skipping/missing taking your birth control pills (or wearing your birth control patch, birth control ring) for 3 consecutive days increases your risk of pregnancy. If you miss 3 days of birth control in a row, protect yourself by using emergency contraception and “act as if you were pregnant” until you know you are or are not pregnant. “Act as if you were pregnant” means don’t drink, don’t do drugs unless you would choose to terminate your pregnancy.