i usually had an u/s at 6 to 8 weeks to check for heart beat and to make sure bub has formed etc.. i did have a bad experiance with enternal u/s with last pg which was a m/c scan was fine less than 2 hrs later spotting started and cramps then it got heavier never found out what caused it, scan was normal no blood visible or anyrhing! im pg again and will reframe from internal u/s as i dont think their is a need specially what happened last time i dont want to risk this little jelly bean! i hope its just nothing and you have a healthy bubba! xxx