I was going to tell you to clear your cache, but it is a little alarming that your husband's laptop can't connect either. That sounds like your ISP. I had a woman not too long ago that had the same issue with Time Warner. It took about a month for them to recognize that it was their issue and get it fixed for her - I hope that's not the case with you!
I so empathize with the "going nuts" - that's awful!!
Go ahead and follow the instructions here.
Clearing your cache, cookies and browsing history. by UnderstandBlue at Splitcoaststampers
Do this on both computers. But I think what you're going to find is that Comcast is the issue and will need to refresh their DNS servers. If it happened with typepad, I'd bet a dollar to a donut that Comcast has DNS issues.