Just been to the loo and blood on tissue and small amount on poo. Started trying goats milk about 2 weeks ago as never been able to tolerate cows milk. Thought it suited me but last few days had to run to the loo first thing in the morning and lots of gurgling noises from tummy. Feel slightly sick too. Coincidence? Would allergy cause blood in stool in adults? Think I need to go to GP?