Matures In Knickers 15 And No Sign Of My Period! Should I Be Concerned?

15 and no sign of my period! should i be concerned? - matures in knickers

Ok, so I'm 15 and my friends have started to establish their time yet and I know that I'm not the same thing, but I feel younger and less well than them!
I have no breasts, I am a 32A and have to use gel pads to fill the bra.
I used to have Virgin losses every day, the light is not only a very strange color on my underwear
Lately, I have not! I have sore breasts or stomach pain
Is there something wrong with me, as my sister 12 years old, has just begun and I am onder her and me!