Ahhh ... cheers I may turn into Werewolf then later on tonight
Is there many Companian quests after the werewolf one?
And ... side topic but as you mentioned it, and just incase it happens, if you turn into a Vampire, how do you cure it?
You can cure Vampirism multiple times. Becoming a werewolf will also cure you of Vampirism, if you are one. You can also cure the disease that turns you into a Vampire before you become a full blown Vampire (these are all options for the game without the Dawnguard expansion, btw).
For instance I was a vampire who joined the Companions and became a werewolf. Then I was cured as a werewolf and went and became infected to become a vampire once more.