7 week scan, slight complication?!

Carrie
Hi there, I have just had my 7 week scan, baby seems fine and seen heartbeat. However they are slightly concerned that baby has implanted itself in top corner right next to Fallopian tube, after lots of examinations and a second opinion they say it appears that although baby is in the corner, they THINK it does have endometrial layer all around it so it should be fine but if I get any pain to go back in as it can be very dangerous! I'm now obviously slightly concerned about everything and I'm wondering if anyone else has experience this? 
They don't seem keen on scanning me again until 12 weeks because "they can't change the outcome" but personally I would like to know if I am at risk! I'm tempted to pay for a private scan. 
Thanks 

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