hi everyone, this is my first time posting here so be nice please

. be warned tough the following is pretty gross! over the past year i have noticed blood in my stools, its not all the time, usually once a month and the other week there was just a really excessive amount of blood so now im doing some research to try and find out what it is. my uncla had crohns disease and my grandfather has colon cancer and my cousin and mum are aneamic (all on mothers side), so as you might see, it doesnt look to optimistic!
so basically i was hoping if someone could tell me at what stage should i see a dr as i am quite reluctant to and what their symptoms involved if they have/had anything like this.
some other symptoms i have noticed are:
sore eyes
tiredness
strong abdominal cramping
a fluttering in the lower right side of my chest
headaches
i have also had tonsillitis 2 times in the past 3 months
i am not diagnosed with ANY medical conditions except for hsc stress! lol
any help would be greatly appreciated, thanx in advance