You are roght to seek medical advice if you are noticing rectal bleeding since this is never normal. For possible causes google rectal bleeding and click on to one of the many sites - the Medicinenet site is particularly informative.
Colon cancer normally occurs at age 40+ although there have been extremely rare cases mentioned in Medhelp when the disease has been noticed at age ~20 - but, as mentioned, this is most rare.
Most likely the cause is probably one of the minor ones such as anal fissure/haemorrhoids etc etc. But, if your doctor is at all uncertain that the cause is definitely one of the minor reasons, then for reassurance you may wish to request a colonoscopy. Your request for a colonoscopy might be more pressing if there is a history of colon cancer in your family.
Even if you are one of "the unlucky ones" to have developed colon cancer at an atypical early age, this disease has a high rate of cure if it is detected early as would be the case with you.
thanks though is it rectal bleeding because it more almost looked like a red chink of food and my stool was not anymore different in smell.
Tomatoes, red peppers, etc, can cause red spots/chunks in your stool.
exactly what I was thinking , thank you