21 weeks spotting

Hi, ftm here. Saya ada spotting coklat semalam satu line je, harini pergi scan apa semua ok je tapi doc mintak refer hospital.. Should i go? Harini takda spotting langsung tapi perut sakit2 sikit. I think sebab tak cukup rehat sebab semalam terlalu bnyak buat kerja rumah. How ya help me..