Diarrhea and passing blood in the stool

I started out with a head cold on Saturday night, feeling hot,cold, dizzy, extremely tired. Woke up on Sunday, head was still hurting. I had a slight case of Diarrhea, which I thought is connected to the head cold. I ate normally, Bowl of cereal in around 12 and a small chicken roast around half 5(the Chicken was cooked proberly. My head was feeling alot better, I had a bath and got in bed around 8. I had to keep going to the toilet though and every thing I passed was very loose. My head is feeling alot better today it's just the diarrhea. My problem is that I'm passing blood with my diarrhea and in the recent hour an orange mucus(thats what it looks like anyway) I thought it was because I haven't eaten since last night, so there wasn't really anything left to pass. But I read on the internet that a doctor should be consulted if this happens. I don't think it is anything serious but I would like to know whether you would consider seeing a doctor about it. I have taken paracetamol.