escape sperm!

Hi all! So, my OB told me my uterus flips, so she gave me very specific instructions to conceive: do it doggy style, orgasm after he does. Check and check. Ok, so no matter how long I wait after the event, the second I get up, whoosh! It feels like it all just runs out. Now I know that some leaking is normal, but I'm worried. What should I do about it?