HELP ME PLZ rotting gums HELP ME PLZ PLZ PLZ?

i really need help , i have always had squinty teeth my family always has and it was my time to get a brace but the doctor took one look at my teeth and said he had never saw worse teeth in his entire courrier so i went homw with all these info booklets and brushed 2 times a dsy i went back a few months later still wearn't good enough for a brace so he said ill give u one last chance if u come back and u come back and i can't give u a brace thats it ure just to old now so i went home and i brushed and brushed and now i have rotten gums, the top is really ok but the bottom there all white and with big cuts in them i keep brushing but every time ibrush it just seems to make the isuue worse and i can hardly eat what do i do im due to see the brace man very very soon i can't get an apointment wih my local dentist not till june and ill have seen the beace man by then what do i do plz help its really sore and i just dont know what do its so sore i cant brush them ,,,, i just need help plz !