OMG, Sionnaine, do you live in res???
When I was at UVic and lived in res, there were times when the university's internet was SUPER laggy. If you do live on campus, there's really nothing you can do about it until those assholes who are downloading teh pr0n finish their download and aren't congesting the university's pipe anymore.
If you DON'T live in res, then try resetting your modem/router, and usually the problem will go away. What I'm finding in here Vancouver weather is when it's rainy/snowy my interwebz starts getting slow. Dunno why, but I just live with it.