Blood in poo

Saphron • 💚II.VIII.MMXIV 💚

My baby has had some blood in his poos and I'm so worried anyone else's baby's have this before what could it be? He's 5 months and formula fed no solids yet! Please comment

Edit the doctor said itsprobably a virus and to keep a eye on it but I'm not sure the blood keeps gettinfworse