5 week US!

Kali • Newly married, may 2105. Suffered a natural miscarriage August 2nd, 2015, baby girl due May 2016!
Normal to see only gestational sac at 5 weeks?! I had a m/c August 3rd with no period in between so Drs are thinking I'm around 5 weeks! At least it wasn't left over tissue from m/c like he was think! Please stick and grow baby!