why did my unborn baby die at 7 weeks

I want to figure out why my baby died at 7 weeks, i went to my 7 week check up and there was a heart beat and then i went in for the 10 week checkup, and theay said my baby died at about the same time i went to my last appointment. i was hurt cause i didnt understand why?????? i had 3 miscarriges prior to this. im very scared it will happen again i just want to have a baby im pregnant now 5 1/2 weeks and scared out of my mind i just want to have a full prenancy

[RockRose]

Since you've already had 4 early miscarriages,  has your doctor done any testing to find out what is going on?  I would call them and ask to have your progesterone levels checked,  and say you are newly pregnant after 4 miscarriages in a row.  

[annaspensacola]

the thing is when i was preganant this last time, the doctor said everything was going well, and then i went for my 12 week cheack up and the babay had died. i recently went to the doctor and she said my baby died at 10 weeks not 7.