Probably call my boyfriend and inform him that we have a pretty big problem. Wait for him to stop laughing at what he thought was sexual innuendo. Then explain it. Followed by hanging up the phone, and going out and getting some to see what it's like.
Now here's a better question:
Let's assume that as your female self you go out and get knocked up. But you turn back to your male self the next day, and find that you somehow still come up as positive for pregnancy.
WHAT DO YOU DO?!