Am i miscarrying again?

I found out i was pregnant 2weeks ago now, as i have had a miscarriage in the past i was sent to the early pregnancy clinic (epas?) i had my first scan and the doctor said i either had my dates wrong or i was experiencing the same as before (blighted ovum) or secret miscarriage i was to come back 7days later, thinking nothing but the worst yet trying to stay positive i went the 7days, to be told there is a heart beat now but very weak one and in her (doc) experience this doesn't end well. As you can imagine i and my partner are devastated but the more i think about it the more i wonder if maybe this one could be one of the few?? Maybe this little guy will get stronger instead of weaker??? Am i living in a dream world here or does anyone think maybe i could be right and should stay positive??? Many thanx for taking the time to read my question, i look forward to hearing your thoughts and helping me think straight.