Spotting early pregnancy

Hi, 1st time mom here. 1st scan confirm pregnancy, ada kantung ukuran 5w3d dlm rahim. Next 2 weeks scan lagi, nampak janin 6w4d tp takda hearbeat. Doc terus buat surat refer hosp. But then saya tak pergi pun hospital, after 4days, ada spotting brownish/cocoa. Now upt 2 line cuma dah tak pekat mcm memula tu. Takda heavy cramp pun. Apa patut saya buat? Btw, period saya tak teratur, takda alahan cuma lately lepas makan je rasa loya. Tp makan selera je. Breast pun still sakit. Mohon bantuan other experiences mommies 😊