Bowel Cancer Symptoms - So So Scared

Hello,

Im 37 female and i have been having alot of blood in the toilet bowl after bowel movements. I also have a cramping sensation in my tummy alot of the time and am always tired. My recent FIT test came back at 74 and i am not scheduled to have a colonoscopy next Friday. I am CONVINCED that during the colonoscopy they are going to tell me they have found bowel cancer. I know alot of other things can cause blood but the amount was unbelievable. I have been spiralling about this for weeks. Im not sleeping, im anxious all of the time. Its affecting everything. My biggest fear is any cancer in general and this is almost too much for me at the moment. Does any one have any reassurance that they can offer? Im currently sat here sobbing x