My fiance and I had an unprotected intercourse and now she is not getting period. its over due date. However, we have tested on the preganews kit 2 times and the results were negative. Actually she has a cycle of 25 days. but sometimes she gets delayed upto 28 or 30 days. But now its oer 30 days and the results are negative. last time she had period on 24th of NOV and now its 28 dec. So we are a bit worried. Please suggest a solution.