Hm... I think that is tricky. Probably some lessons learned, but since you asked them for a higher salary and they matched what you asked, I wouldn't go back and ask for more again.
What I would do is ask for a larger raise next year. At annual review time, you say something like "It's been a great year and I'm so glad to be working at <company>. One thing I want to discuss is that I was so excited for the opportunity to work here that I gave a lower number for salary expectations than I otherwise would have. And while I'm thrilled that the negotiations worked out and I did end up here, the difference in salary is proving more challenging than I anticipated. Accordingly, I would like to request a raise of $14,000. (or $9000 + whatever number they'd normally give you as a raise.) I recognize that this would normally represent an unusually large raise, but the important thing is that it would bring my salary more in line with the other offers I got when considering this position, and help alleviate continual worries in these challenging and uncertain economic times. Given my strong performance <assuming you did well> and my enthusiasm for <company you honestly don't give a shit about>, I don't think it would set a problematic precedent to make a one-time exception to our normal compensation adjustment patterns."
Hm... I think that is tricky. Probably some lessons learned, but since you asked them for a higher salary and they matched what you asked, I wouldn't go back and ask for more again.
What I would do is ask for a larger raise next year. At annual review time, you say something like "It's been a great year and I'm so glad to be working at <company>. One thing I want to discuss is that I was so excited for the opportunity to work here that I gave a lower number for salary expectations than I otherwise would have. And while I'm thrilled that the negotiations worked out and I did end up here, the difference in salary is proving more challenging than I anticipated. Accordingly, I would like to request a raise of $14,000. (or $9000 + whatever number they'd normally give you as a raise.) I recognize that this would normally represent an unusually large raise, but the important thing is that it would bring my salary more in line with the other offers I got when considering this position, and help alleviate continual worries in these challenging and uncertain economic times. Given my strong performance <assuming you did well> and my enthusiasm for <company you honestly don't give a shit about>, I don't think it would set a problematic precedent to make a one-time exception to our normal compensation adjustment patterns."
Thanks for the advice