Blood in stools and loss if weight

I've always had problems with my bowels really, constipation and piles and the occasional blood in my stools. Since Novemeber (3 months) I have lost half a stone, I have lots of blood in my stools, stomach pains and recently I have been getting heartburn so severe I'm sick and the pains awful. I went to the doctors and they had my do two stool samples plus I had to send one of for a bowel cancer screening. Also got blood tests booked next week. Just rang the doctors and My stool samples I gave to them have came back normal-no action. They were not normal and covered in blood. I don't know where to go from here. I'll wait for the bowel cancer test results but I'm extremely worried.