Colonoscopy in one week

I decided to write about this as I cannot find much information on the internet that eases my mind, so maybe this will help someone, of course, if my outcome is positive.

Here is everything I can think of as symptoms and history. I'll try to make it as complete as possible. I am 39. I had two pregnancies at  35 and 38, so I recently gave birth to my second daughter, she is 6 month old. During late pregnancy, I had anemia, I was not taking my vitamins and would not tolerate the iron pills. I was feeling fine energy wise though. After giving birth naturally, my anemia got even worse so I started taking iron pills. I have gotten a bit constipated but not too much. I only took one pill vs. 2 per day as recommended, so I did not constipate that much. Later on, I started noticing blood in my stool. Only a little bit on the paper and somehow I did not worry, who knows why?? I thought it must be a fissure. Then one morning in early May of this year (2015),  I saw a lot of blood, as in drops on the toilet bowl and in the stool. I freaked. I booked an appointment with  my family doctor for next week but when the day came, my appointment was cancelled based on a technicallity about where (to which clinic) I should see my doctor. So I went the same week on Saturday to a clinic close to home to see the doctor on duty there. He said, must be some internal hemorroid, gave me a cream and scheduled me for a rectoscopy to be done by a surgeon in 3 weeks. I also scheduled an appointment with my family doctor to the right clinic for 3 weeks later. When I saw the surgeon, he did not do the rectoscopy and said I should have a colonoscopy instead. Days later I saw my GP who was not worried, said it was hemorroids, but I came out of the office and scheduled a colonoscopy for June 19th.
So here I am - a week before a colonoscopy. Other symptoms, I have lower back pain, but I've had back problems since 18. OF course, we can always explain all symptoms, but I am putting it all together. My stool is soft and rather thin, and long, but sometimes fragmented. I also saw some mucus. So when you put all these together and you type it on google, colon cancer is everywhere. It does not help to ease my mind at all. I panicked and sheer terror came over me. I picture my babies growing up without their mom.

Now I have to focus on preparing really well for the colonoscopy as if the colon is not clear, they won't be able to see well. I need to have an answer on the 19th, so I keep this goal in mind. Of course, I dread the prep, horrible - I need to drink a gallon of this gross liquid, a glass every 10-15 minutes. I will post all the details as I go through it. Also, I am planning of doing the liquid diet 2 days before the procedure instead of just one. Maybe it will help me clear out sooner. If what comes out is water, then I am done.