My period starts the last week of each month and yesterday (8/15) i noticed brown spotting ... the day before that (8/14) i tried this lotion you rub and it helps masturbate . and thought it was because of that? 
 I have been reading an article that it may be because im athletic ,and its natural but i want real answeres. im 15 years old . i want to know what causes the spotting , and if i am pregnate when can i take a pregnacy test? after it stops?