Connection interrupted - network change detected

Hey, sorry if this doesn't fit into this section of the forums, but I have a question.

Apparently the internet at our place has been shakey recently, especially today. I got a message "your connection was interrupted  - a network change was detected" twice - both when logging into things. Once was my university's website - I refreshed and I was then logged in. The other time was logging into my email account - the message appeared briefly but the page loaded afterwards without me needing to refresh. My flatmates had been reporting the internet loading pages slowly or not at all not long prior, but it seems odd to me how it's only happened to me when logging into things so far. It didn't occur when logging into my Norton forum account, and a Norton full scan shows nothing - is this suspicious, or am I being paranoid?