You took 2 pills in one day by mistake should you open another pack of pills and take that one tomorrow?

Depends on the brand of pill you are taking.

Consult the package insert that came with your prescription, or ask your pharmacist or OB/GYN to check the written information for that particular pill.

In general, you never want to go more than 24 hours without taking a pill, but it does depend on the brand and strength that you are taking.

Taking 2 pills withing 24 hours by mistake is generally not dangerous, but could result in some temporary side effects such as nausea. Consult your OB/GYN to be safe.