What do I do?

Guilt

You know those things you do and then you regret them instantly afterwards? You know that moment when you just realise, 'I regret doing that'? You know that feeling?
Well imagine that feeling. Then add a sense of guilt to that. Can you imagine that? Now add an incredible amount of worry. And the fact you have to wait for a response. How about now? Can you imagine feeling like that? What if I said to add a feeling that you've betrayed your best friend? Because that's how I feel right now. I feel so damn guilty, and so damn worried. And I regret what I said so much, because I shouldn't have. I should not have told anyone. Because now people know. And I didn't want that. But I had to tell someone, I couldn't just leave it. It wasn't fair on me. Or that's what my mum tells me anyway. They've all told me that. Trying to help. Trying to comfort me, knowing exactly how I'm feeling; terrible.
I told and betrayed my best friend. You don't just do that! But I couldn't not tell. I had to. And that doesn't help my mixed feelings. It doesn't help at all, because I know I had to tell but she didn't want me to tell and now I have and she's going to be angry...
So, so angry. At me. Because I just told someone. I can't believe I just did that. What the hell is wrong with me?! It wasn't my secret. It wasn't something for me to say. But I did! I just went and told the school! And now they're going to tell her parents! I didn't want this to happen. I didn't want her parents to have to find out through the school. I tried though. I tried so hard to get her to tell them, but she didn't. I tried so hard to get her to tell anyone, even childline where she could've been anonymous. But she didn't, and now I've told, and I feel horrible. Absolutely horrible, because it must be worse for her. It must be completely horrid to suddenly find out that the people you fought so hard to keep your secret from know... It must be awful, because she's been hiding it from them for so long, no one knew until she told me. And now they all know. And she wasn't even the one to tell them.
She'll know it's me. How could she not?! No matter what she's told, she'll know because I'm the only one she's told.
I can't do this! I can't take the waiting! I don't know what's happening and it's killing me! She could just be ignoring me and my messages. She could just be so angry she'll refuse to talk to me ever again...
I don't know what I'd do if that was the case. She's my best friend, it's not like I don't have other friends, it's just she's my closest friend. I don't want to find out what it's like to lose your closest friend. Who does? And now I might. All because I told the school.
It's such a small thing, to tell someone, it was done in one sentence, but the consequences are massive and now I'm scared. Absolutely terrified, because I don't know what's happening! I don't know what's happening and I don't know what to do while I wait. All I can do is wait for a reaction. A message. Just something to tell me what's going on with her, what the consequences of my actions were. Just something! Anything would do, at least then I'd know! And right now, I have no clue! She could be going through anything, and I know she's got her family with her, but it must be horrible at the moment, and I caused it. I can't get that out of my head. I caused it. Whatever she's going through, it's all my fault and I can't bear this silence! I can't take it anymore, but what other choice do I have?! What else can I do?!
What do I do? Because at the moment all I'm doing is watching my iPad for new messages. I'm looking every few seconds, wanting an answer but not wanting to know. Wanting to know what's happening, but not wanting to know if she hates me. I want to know, but I don't.
And then the response comes. It's two words. Two words. Two simple words. Two words that change everything. Two words and I know know. Two words.

Thank you.