I think the weird part here is that she spent half an hour in the bathroom. Was she legit puking? If so, you should have been in there comforting her. That's probably why she's pissed.

But I mean why give a bj if a little bit if cum makes you throw up? She had to know at some point he was likely to cum.

To the OP, I assume she knows about your lack of experience? If so, use that as your excuse. Tell her you've never had a bj before and it caught you off guard how fast you came. I mean if she doesn't understand that, then there's not much you can do. I definitely wouldn't wait a week before sending her another text or calling her. Just call. This is a conversation that deserves a phone call not a text. Tell her you'd like to make it up to her with a meal and no sexual stuff. Just to hang out. Do something. But I disagree with people who said wait it out. If you do that, she probably thinks you don't care. Reach out again. Call and if she doesn't answer text and ask her if you can talk on the phone soon.