Bright red baby poop!?

Yesterday my 1yr old son vomited in the morning & had a little diarrhoea. In the afternoon he had a solid lime green & bright red poop, the top half red & the lower half green.

I took the soiled nappy & my son straight to the doctor & she said it was either unprocessed watermelon (he had fruit salad for lunch) due to an upset tummy with gastro as he also has a snotty nose or a small bleed in his lower colon.

Well, this morning there was more red in his poop plus some unprocessed carrot.

He acts completely normal, happy, playful & loud, until he poops. He cried for a second then he had a smelly bum!

The doctor said to just keep him at home until the analysis on the red poop comes back but I'm nervous!

Anyone have this with their baby too?