Is OTHER wrong in the post ? POST : I know the title sounds horrible but hear me out.
My girlfriend of 2 years (maybe ex) was crying to me about a long-standing debt issue she’s had with a credit card company. Since I’ve known her, I’ve been trying to convince her that she needs to either transfer her balance or just let me cut a check and pay that shit off.. because as of now she’s just been making payments to her convenience that does nothing to her balance because interest just keeps stacking on top of the principal balance.
Finally, she started taking action and decides she will transfer the balance to another creditor for a fee, but now free of interest for 18 months (after months of me nagging that we need to get rid of this issue permanently). 
She gets denied a few times but finally gets accepted for a certain amount and she is extremely stressed out at this point because she is afraid her credit went down because she applied for the other transfers that she was denied for. So, as she was crying about over FaceTime and telling me all the details about what one of the creditor representatives was telling her, me being slap happy, fucking tired and one who nervously laughs in situations that I’m asked to be very serious in, started busting out in uncontrollable laughter..... 
Was I laughing at her? No. I was just tired and stupid, it was late.. Do I take her seriously? Very. Do I think her situation was funny? No, I’ve taken all the initiative since day one to correct it.
Anyways, she hung up the call and since refuses to speak to me and it’s been a week. The last thing she said to me was that I hurt her and she doesn’t think I can fix that (over texts, when I tried talking to her a few days after she said she needed her space.)
I know I was a terrible person for doing that but it was NOT intentional, I couldn’t even have taken it back if I wanted to.. I don’t even know WHY I laughed.. it’s kind of hilarious I’m sure hearing this story...

AITA though?! A week? I’ve texted her multiple times apologizing and called her but she won’t even answer. And she’s acting like this is it for her... I feel like what I did was bad, but not as bad as she’s making it seem..