My Miscarriage...

I had gone to the hospital to get a pregnancy test tuesday and tested positive. I discovered I was at the 7 week mark of the pregnancy. Everything was fine and I had gone home still processing the news. That night I woke up cramping and bleeding heavily. I was completely panicked and went to the hospital to find I was having a miscarriage. I found out I was pregnant for the first time to losing that pregnancy that night. I had a complete miscarriage. I am so emotional and processing what had happened but I just can't understand it.....