Im scared and need help


So my period came june 11th and ended 16th and then was sexually active 20,23 and 24th then my period came again but lighter june 27th to july 1st then stopped now 2nd and 4th,5th and today ive noticed and been dealing with some light in flow but dark brown spotting. Im concerend because this is the first time this has happened to me. I have normal period