Yes! My 12 week scan they couldn't do on the outside because of my retroverted uterus. So they went internal. I hadn't had any bleeding up to that point, except a small amount after sex at 5/6 weeks.
As I was getting ready to leave the ultrasound, the sonography said "by the way, when I pulled the wand out there was some blood, just so you're not surprised". I obviously panicked. I asked her if it was because of the scan and she said 100% that it was not, that it cannot cause a bleed. She couldn't tell me more and gave me the details for epu. I was beside myself. Went to the bathroom and there was more blood than I expected. I thought it was over.
Called the epu on the way out of the hospital and they said that because I'd just had a scan, they wouldn't do anything. They said to monitor it and if I hadn't stopped bleeding in 2 weeks to call them back. I was terrified. Again I asked if the scan could cause it and she said absolutely not. If you Google it too, everywhere says it's highly unlikely the probe will cause bleeding.
The blood thankfully dried up and turned brown that evening and was gone by the next day.
The thing that upset me the most was that they kept telling me it was not possible that it was the scan, when I knew in my gut it was. It just made me ask "well, what is it then?!". And you obviously don't get any answers.
Thankfully we've made it to 36 weeks so far with no more bleeding (touch wood) so I hope this gives you hope.
Good luck!