Should I be worried?

So I’m 28 weeks and 2 days today. This morning I had diarrhea with what appeared to be red in it, however I’m not sure if it’s blood or not. I drank a fruit punch water packet last night so it could be that. Should I contact my Ob, or if baby is moving will it be fine to just watch and see if it happens again? Baby has been moving around just fine all morning and I have no cramping or pressure, no back pain besides the normal back pain that’s accompanied my entire pregnancy. I just feel tiny little kicks