Colonoscopy

Hi im bec im 39 im waiting on a colonoscopy next week. Im extremely scared right now. About a month ago I felt pressure in my bottom during sex I thought it may have just been piles. Fast forward a few weeks and it didn't go away so I had a feel I could feel a mass. I went to the doctors who confirms its a mass About 5-7cm large. This past week ive now developed new symptoms of tummy pain ranging from a dull ache to being woken up at night with sharp stabbing pains. Acid reflux and feeling sick. Im struggling to eat anything as when my tummy is empty i dont feel as sick.I have two young girls im so worried im not going to be able to look after them. I dont really know what I want to accomplish by typing this as I know I won't get any answer till the tests have been done. Its consuming every second of my life im so scared. Im worried about having the procedure and taking the laxatives, im scared what they are going to find. I know there is something there thats not hemorrhoids. My mum passed from bowel cancer when I was 7 and I really dont want to leave my kids and loving husband.