Freaking Out

So I had unprotected sex on the 16th of December and we used the pull out method which was successful because he came in his hand . The second time we had sex was on the 28th of December and we did the same method but I wasn’t sure if he came in me or not so the next day I took a plan B and my period was suppose to come on the 1st . It still haven’t came on and I’m extremely nervous please give advice