Im praying some one can help me out with this,.....if u can it would be great

Ok im 18 im sexualy active but im not on any birth control....I always have abnormal periods..there never on time they come late or early super early sometimes like 21 days a apart....I was pregnant once that was last year when i was 16 turning 17 the whole pregnancy i was having pain so i had 2 take it out because i was in so much pain...then i found out i had cancer cells in my uterus....

Ok 2nd part i havent been sexualy active since maybe a year until about a week ago.....and i had my period about a week ago maybe 3 days before the sex.....and now im having a mucus discharge i know thats normal but it had blood in it...and it just keeps getting worse...jus more brown and red blood coming out with it.....i wanted 2 know if anyone knew if that was normal or should i get checked...THANKS A BUNCH 4 ANY HELP :-D