Help Badly Idk Drops?!

and if i was on my "period" it would literally be drops just enough for panty liner, i seriously hate pads and panty liner and im 13, i started my period december of 2014, 

my mom says its ok but my step mom says its unhealthy, its happened 3 times already and its back today, the first time it was for 1 week a 1 week break from it and it came back for maybe 8 days? and it happened again . I have no idea what it is? Stress? im very healthy even tho i love sweets and junk food but i maintain it, i am also under a lot of stress with my mom lets just say we do not have the best relationship :( but i told my dad today and he said search it and if nothing comes uo we will go to the doctors. 🌼