I agree with redcrx, pretend that you have quite severe like period pains. Explain that you've had a misscarriage before and had similar pains during that pregnancy. I had a scan on the day, even though I was too early and thay couldn't see anything. But, they saw some good signs that reassured me. If you stress you're doing yourself no good or ickle ickle one in you're belly either.
Go do it girl, take a day off work and call epu one morning, they will make time for you. xx