Hi I'm 18 Years Old And Since October I Have

Hi I'm 18 years old and since October I have been bleeding mid cycle , I have been doctors and had an ultra sound aswell to check for cysts I am sexually active but have not had intercourse for about 9 months , it stopped for 2 months but started again today my periods became really irregular but I know I should be due on in the next 5/6 days the doctord thought hormonal imbalance but I'm scared I have had a very stressful month my eating has stopped due to stress