Prolonged periods- (blood spotting) Me?

Hi, I m 26yrs female. I have irregular periods problems. My cycle comes in 1.5 months to 2.5months. In December 2020 I had taken meprate 10mg for inducing periods and had got periods then.  But after that in the end of March 2021, I experienced few sticky blood droppings( as it in start and end of periods) for 3-4days and stopped. After a month. In May 2021 i started cardio exercises and started experiencing blood discharge ( few spottings , sticky red blood , sometimes brown , the flow is very less just like regular white vaginal discharge having red colour). Now its been more than 20days I m still getting blood spottings. What has happened to me? I do not experience any weight gain, hair gain in facial/chest regions, i have clear skin and I maintain a vegan healthy diet. I m 154cms and weighs 51kgs.