when i lost my baby i was in ER with this woman who came in a couple of days before me and had bleeding that was worse than mine. she was desperate, also woke up in the middle of the night thinking she'd wet herself to find her pj just full of blood all over the place. she was bleeding so badly they kept her in and put her on the drip for 4 days (!). but they gave her a scan each day and boom, the baby was perfect, 10 weeks along and also no idea where the bleed came from. she went on bleeding heavily for 4 days in the end, and baby was completely unaffected.