2 week referral for colorectal cancer

I am absolutely beside myself with worry, I went to the doctor because I had been having a itchy bottom and two small what feel like papercuts, and sting when I poo. She examined me and asked if I had pipes that day because she could feel a lump which she said could be poop or a pile or a mass :/( she did say that because I had no other symptoms that she's was sure it's not the mass but had to refer me anyway, she also did bloods which have come back normal but I have just received a letter saying that you doctor has referred you for suspected colorectal cancel and that I have to have a flexible sigmoidoscopy on Monday, and a FIT test so now I am so worried I have this ? I am only 44