How?!

Kali • Newly married, may 2105. Suffered a natural miscarriage August 2nd, 2015, baby girl due May 2016!
So I went to the doctor for blood work to make sure my levels went down to zero. It came back at 2. But today, I got this! Was it maybe just to early to detect? Don't want to get my hopes up! But I hope this sticks!