Sorry Teech but I completely missed this.
Did it resolve itself as it sounds like your broadband was down what with both computers not seeing the site. If you could browse the rest of the internet ok then it was more than likely that your host's server was offline as that happens from time to time and would also account for not being able to get into your control panel. If that does happen you should have a support system with your host that are usually "tickets", and you should warn them of the outage as soon as you experience it, otherwise like our old host here, they may not spot it for half a day!!