I take Trivora birth control pills and I believe I lost a pill. I can't remember my start day so i'm not sure if I lost a pill or not. :( My question is how many days to it take to get back on track? 7? 14?

Hi mae16,
Thanks for your question and for finding EmpowHER.
I'm not sure what you mean by "I believe I lost a pill." Did you forget to take one? If you think you accidentally skipped one, or if you dropped one when taking it out of the pack, you can make it up. You can either take 2 today, or just keep taking your pills and use a backup method (condom, spermicide, withdrawal). Regardless, it may be a good idea to use a backup method until you finish your pack of pills and can start on a new one. Make sure to use the stickers that came with the pills if you are not a Sunday starter--mark the correct day on your pack somehow so you know if you skip one.
For more information, please review these articles: Missing Birth Control Pills and Concerned About Pregnancy: Q&A and and Oops! Missed Birth Control Pill Advocacy Sheet
Good luck and let us know how you're doing.