I had my first ultrasound today. They saw one baby with a heartbeat (116), measuring 6w3d. Plus they saw another sac that was either just blood or a second baby. They had a hard time getting a good picture based on the placement. I go back next week for another ultrasound. Has anyone has had this happen?

TTC Since April 09
6 Rounds of Clomid & 4 Rounds Femara
IVF#1 April 2012 ER- 4/9/12 ET- 4/14-12 Beta#1(4/27):160 Beta#2 4/30: 484
Re: Blood or Second Baby
7/30/12 - B/G twins born at 33w4d due to PPROM
Right ovary removed 09.04.2012 via vertical laparotomy
Essure implant placed on remaining tube 06.13.2013; successful followup scan 09.30.2013
TTC Since April 09
6 Rounds of Clomid & 4 Rounds Femara
IVF#1 April 2012 ER- 4/9/12 ET- 4/14-12 Beta#1(4/27):160 Beta#2 4/30: 484
TTC since May 2006. After 3 failed Clomid cycles, 2 failed Injectibles/IUIs, 2 failed IVFs and 1 failed FET, we moved on to adoption!
Last ditch FET resulted in BFP, and identical twin girls!