Last week I was offered and accepted a new role that I wanted very much. I was excited as could be and the company seems great. On Monday, I very unexpectedly got another offer from a second company that I had interviewed with as well. I would prefer to go to work for the second company as the offer is much better, and the role is quite similar. So now I'm left in the position of withdrawing from the first company. I'm an absolute NERVOUS WRECK about doing it. Any tips? Advice?