PILL MISSED IN FIRST WEEK HELP!

I’m still in my first week of my strip, and on the third day I forgot to take my pill, it’s exactly 24 hours after the time where I should’ve taken my pill. I’ve taken my 4th day pill correctly, but because it’s been a whole day without taking one I’m unsure as to whether I should double up and take the third day? And If I’m still protected? (I haven’t had sex this strip yet but would be in the next few days)- so really need to know if I’m protected for this next week or I should use another barrier etc and what to do with then

Thanks so much any advice would be useful!