Hi! So I am 15 going on 16 in a couple months. I have not gotten my first period yet. I have been experiencing a lot of symptoms for a while now like
Clear discharge for around a year (daily)
Breast development
Pubic hair (lots)
I am very tall 5'8'' and about 115 lbs
I have been to the endochronologist because I am such a late bloomer and was told everything was normal.

But for the past two days I have been experiencing light brown with a bit or redish/pink discharge. It is not a lot and is not constant. It is very thick and mucus like and smells bad. I have seen it about 2-3 times a day when I wipe it is pinkish brown but in my underwear it has not red at all just light brown.

Is this my first period or a sign it is coming?

It could be. Each person is different, but you may not have any red blood at the beginning.