Mad With My Doctor

i had been going to my doctors for a few months complaining about mucus and bright red blood in my poo and changes in my bowel habits he never examined me all he said was nothing to worry about becos its bright red blood and fobbed me off with some cream,i went a second time saw a different doctor and told her the same but was suffering from constipation and diariaha she gave me tablets to stop me going to the toilet and some horrid sugary liquid to make me go wasnt happy went a 3rd time told my doctor i was worried he said when i go see my blood specalist i should mention it to him so i did he wasnt happy so he wrote to my doctor explaining that he needs to examine me my doctor rang me to go see him he told me to lay on the bed and all he said that there wasnt anything there referred me to see a colonrectomy dontor she arranged scans and now been confirmed i have stage 3 anal cancer im at my wits ends and worried please help feeling angry