Signing into Skype

I only have one email address and after three times Skype accepted it. I only have one password and when I was on Skype the other day my password was accepted. Now it keeps telling me my password is incorrect!!!! I have only had my laptop for two months and have only used Skype that one time. Now I can't sign in with the password I signed up with and I am getting a bit disgusted, not to mention angry. I am not a computer whiz, but I am not an idiot either. I have no one to help so everything I do is trial and error. I am 68 years old and this is my third computer but my first laptop and first Skype. If you have an answer please make it in "plain English"!! I have paid for two years of Geek Squad and found they aren't much help.