not sure. you'll definitely know by the next u/s.
i had an emergency u/s at 9 weeks when i went to the er for what i thought was a miscarriage. i was fainting (i passed out in the grocery store while shopping with my mom...talk about embarrassing), cramping and having horrible back aches (so bad i couldn't walk) my mom rushed me to the er and when the er doc did the u/s....they found two very distinct little tadpoles with two sets of eyes and two little heartbeats.
Sorry I ment to post the picture