Screwed up at work...now a ball of stress and anxiety...

Long time reader, first time poster....hoping someone can help me out of my misery....

So I screwed up and missed a crucial deadline at work and my supervisor ripped me a new one. Mind you, I telecommute and this is over Skype instant messenger and I've never met my supervisor face to face or could tell you what she looks like. But I feel horrible for screwing up and even though we fixed it as best we could with another coworker picking up the slack to meet the deadline, I'm now a wound up ball of anxiety and stress.

My brain is stressing about receiving a reprimanding email, losing my job and the consequences that will follow. I know it's all "what ifs", but how do I just move on and shut my brain off? I know I caused a lot of stress and last minute work for some people and it was my fault. I'm feeling so stressed out. I feel like this is going in the "remember when" pile that my brain loves to pull up and make me feel bad about, years after the fact. Solutions, help, advice all appreciated so damn much.