No u don't always bleed if something goes wrong. In 2009 I lost my 1st son at 25 weeks... I went to my sonogram an his heartbeat was gone but they never could tell me why... but I wouldn't worried urself u r still very early. I hope this answers your question.
Not always. It's called a missed miscarriage.
Depends on the situation and how far a long you are. But don't jump to conclusions so, what's going ?