Hi Jess,
I am new to all this and can't comment on your dating, bleeding etc. except to say that I hear so many stories like this that end well, with a healthy pregnancy and bubs. I think that having seen the heart beat is a great sign. I totally understand your worry though and it's frustrating that nobody can tell you anything for sure. I've found these last few months exhausting, just trying to stave off the 'what if's' and stay positive.
Big hugs and good vibes to you and your bubba.