Colonoscopy - 28mm polyp removed

Hi all, 

I had my colonoscopy today and I just want to reassure everyone who is due to have one that the thought was worse than the actual procedure! It was painful but the team were amazing and I was given pain relief and sedation.
 

They found a 28mm polyp, apparently this is quite big? It looked quite inflamed and I could see it was bleeding on the monitor. They removed it there and then and sent it to histology. 
 

I now can't stop worrying that because it was big and inflamed that it's cancer :( How long on average does it take for histology results to come back? I'm so scared and really trying to put on a brave face for my husband and two young boys x