Have a look at this
thread. I was actually searching for another one where I did a step by step guide for somebody last year with multiple screen dumps but that thread shows a similar thing plus is illustrates your issue quite nicely. The point I was going to make is that you wouldn't necessarily know something was wrong now if you hadn't done a trace route previously because you wouldn't realise your traffic is going on a different route. The thread I linked to is on a different topic but you can see that my traffic is taking different routes though. If you do one now for the fun of it (to somewhere generic like bbc.co.uk) you might notice a difference when your connection returns to normal (it will be in the 3rd or 4th hop). Click on start and type "cmd" to open a command prompt and then type "tracert
websiteaddress"
I think I was thinking about this
thread but it is more about pings.