I didnt come out, they found out

So my parents figured out I'm into chicks about four months ago. They found this out by going through my phone while I was asleep and reading my text messages with a friend I was consoling in. They said they are fine with it but I know my mom doesnt really believe me. I could marry a girl and she still would have her doubts. Anyways, that's not the point. I know its rediculious because they know already and said they are okay with it but I wasnt ready to tell them yet. I'm still not but they already know so it's too late. I haven't even come to terms with it myself yet and now I have to help everyone else understand it when I dont yet. Again, I know it's too late, but... I just wasnt ready and it's not getting any easier. It's still gives me so much anxiety when its brought up in conversation. Is there a way for me to come to terms faster? Or am I stuck in this constant state of panic?