Could it still be alive ??

Samantha • trying for number 3
Dr said on thur my baby of 7w and 1d stopped growing sometime last week and lost its heart beat as well but I still feel pregnant and my test are coming out darker and coming out quicker now !!! Usually it would take a test to show the two lines about 5 mins today it took 3 seconds and it was there darker then before... Any hope ???