Hypothyroidism

Does anyone have hypothyroidism? I've been trying to get to a doc to be tested, but I've been having insurance issues. I have all the symptoms from unusual/fast weight gain and late puberty to brittle nails and no sex drive. When did you know/find out? Do you take medication and does it help? I'm 95% sure I have it, so I'd just like to know how it is to live with.