Sayang, symptoms macam ni kena check dengan doctor sebab ada bleeding yang tak pattern dan sakit perut, please don't delay, okay? Could be anything from hormonal shifts to something that needs proper checking, jadi jangan self-diagnose. Go to your GP or clinic ASAP, especially since you're getting brown discharge dan cramping, they need to see you in person. Wishing you all the best, mummy will be praying for you