You sound like me..I started Depo in Jan 2010 and had my second shot in April 2010, am due for my next shot antime from now until the 15th and I have not stopped worrying since day one of getting the shot. I have taken over 20 pregnancy
tests, and went to the doctor and they look at me like I am crazy, but worrisomeness and panic attacks are side effects. Yesterday I was really sick vomitting, and all I could think about was...OMG!! But deep down I know that it is not a pregnancy because I have taken the shot when I am supposed to, so just try to remind yourself that and if you hate worrying about it then dont get the shot anymore...IM NOT!! good luck!