I know there are a few questions about verbal offers vs. written offers but my conundrum is unique in that I received a verbal offer and have not yet received my written offer, but I totally jumped the gun by declining other potential interviews because of my verbal offer. I realize now that I was really stupid to not accept any more interviews, instead telling potential interviews/employers that I received another offer and I'm currently off the job market.
Now, I'm paranoid that something will go wrong and my offer will be rescinded. I received the verbal offer on Monday, accepted (verbally) on Tuesday, and was told that once they pinned down my start date, I would receive a written offer letter in the mail. It's Saturday now and I haven't heard anything from the company since Tuesday. How common is it that offers are rescinded?
And, in the worst case scenario, if my offer is rescinded for whatever reason -- how do I go about contacting potential employers that I previously notified that I would not be able to continue the hiring process with them because I received another offer? Should I even do that at all, or will I look incredibly dim?
I apologize in advance if any of these questions have glaringly obvious answers. I am a recent grad and very new to the professional world.
EDIT: Got the offer letter today! I was, indeed, overthinking the situation. Thanks a lot everyone for your help and advice.