What do you think is the truth?

Well, I had my little boy in Feb 09 and he is now almost 5 months... the day after i has him i got my first Depo shot. I then went to the doc on May 15th to have my next scheduled shot. This last week i have been feeling sick. I keep felling "preggo" but i am in no way am...right? Wrong. I took a test yesterday to ease my mind and it turns out i am pregnant.I was freaking out at first but now i calmed down and actually excited. i took another one right now and it is negative. ...When i took the first one i saw the results 1 hour later? The purple line was DARK tho... could it have been out to long and false??