Should i be worried about this?

Ok im a 15 year old female. And so today i went to applebees, i ate their salad and chicken alfredo. So after i went to the bathroom right, Then i went number 2 like not to be gross, but dihhrea. And it was green. So i went back and finished eating my salad. When i got home i went to use the bathroom and im not sure if it was dirrhea this time but it was green again. And maybe on 2 stools there was a little blood, not on the whole stool but part of it. This had happend before (the blood), like for a month or 2. It would come when i pooped then stopped for awhile and would come then stop, Usually when my stool is big. My dad said i probally teared my . But yeah i dont have a fever, nothing i feel fine. And i dont smoke or drink. Any ideas?