Get a colonoscopy as soon as possible even if you yourself have to pay. Your symptoms are indication that you should not wait. I don't mean to scare you but the sooner you get in the better off you will be...no matter what. I feel someone really needs to tell you this isn't a time to fool around. Don't wait. Be pro-active. I wish I had told my sister this when she complained of rectal bleeding. She did not have a colonoscopy. Fast forward ten years. She's dead from colon cancer. I am so sorry to be blunt but I feel you need to be told the life you save could be your own. Good luck. Pick up the phone and make an appointment for a colonscopy. NOW.