Sabar ya, alhamdulillah spotting dah stop, that's a good sign. Honestly, a few of my mum friends had subchorionic hematoma and most resolved on their own, tapi the long driving tu memang I'd be careful about lah especially dengan history miscarriage you punya. I think best approach is jangan push yourself, try to reduce the 4-hour drive if possible, maybe work from home days, carpool, or discuss with your boss? The stress + fatigue dari driving panjang might not be worth the worry. Please check in properly with your OB about your specific case and this driving situation, especially since you've had loss before; doktor boleh kasih clearer guidance on what's safe for YOUR pregnancy. Many of us dalam anxious phase macam ni prefer to err on the safe side je, takpe a bit inconvenient.