Haih, I understand lah, these are scary things to think about during pregnancy! Honestly, a few of my mum friends have shared their experiences with this, tapi everyone's situation is really different, so it's best you chat with your doctor or gynae about your specific concerns and risk factors, they can monitor you properly and give you the peace of mind you need. If you're worried about symptoms or anything feels off, don't wait lah, just call your clinic, better safe than sorry when it comes to our babies.