No way right?

So I had sex on the 11th and according to this chart it’s after I ovulated so I should be in the clear automatically my first thought. I used coconut oil as a lubricant heard it was safe to use and I said well you start to get a little dry after ovulation so I used that to take the place, he used a condom I watched as he put them on and took them off anyways we went two rounds and now I’m a day late, but just read that it can mess up latex condoms and make them less efficient to protecting you from getting pregnant. But I’m thinking there’s no way this could happen, never heard of it. But now I’m thinking did me and my sister switch periods because she came on when I was suppose to and she wasn’t due until Monday. So I guess we’ll see