Hindi ka nag-iisa, girl! A few of us had bleeding scares during pregnancy din, kaya alam ko kung gaano ka-stressful yun kahit na okay ang ultrasound. The good news is, your OB checked everything, ultrasound was normal, baby's fine, at ang pus cells mo ay bumaba pa (3-5 is way better than 15-18!), so that's really reassuring. Minsan talaga may bleeding kahit walang subchorionic hematoma, especially if may slight irritation or UTI brewing, pero since your UA shows improvement, sounds like your OB's got a handle on it na. I know it's scary seeing blood pero trust your OB's findings, they actually saw baby on screen and everything looked good, so you can breathe a little! Keep hydrating well and if may repeat bleeding or anything else off, message your OB agad, but from what you're describing, you're in the clear.