EMERGENCY

Hey, I have a question ... I took the depo shot and  it ended on February, no period that month. This March , I had my period on the 11 or 12 and ended on the 20 . I had protected sex on the 21 ( condom and pulled out when he was ready)... Well today( 25) I realized  im spotting. What should I do ? I'm going to get a test tomorrow (26)  I'll let you know the results