Browsing one of those online medical sites. If self-diagnosing from reading on the internet with partial knowledge is not scary enough, you can also try one of these do-it-yourself test kits. Evidently you can find HIV, hepatitis, liver tests and many, many more test kits and do them from the comfort of your own home. I sure hope the interpretation of the results are as fool-proof (is it really?) as a home pregnancy test!