Funny awkward and scared

So I had sex this passed sat, and the most embarrassing thing happened. We used a condom because I already have one kid and am definitely not wanting another rightnow. Well my effort to be responsible failed when he came in the condom and then the condom fell off inside of me 🤦🏻‍♀️🤦🏻‍♀️. He was respectful enough to buy me a plan b and I took it within 24 hours of the sex.... did anyone else experience pregnancy like symptoms from this pill?? Because I am, either that or I am pregnant. But I don’t know how I could have symptoms that quick.. I’m freaking out and super paranoid. Like I said I am not ready for another baby and I literally tried to prevent it.