Is my fish gong to be okay?

I got a fishy (as many of you know) and I just got him pebbles (again, a lot of you know) and my beta has been through a lot of stress.I don't know if im imagining or its true but I think that he is developing purpl on his scales and I think that his head is either grey or scaleless.ill try to upload picture as soon as I can and im worried because hes been through a lot of stress. plz help