Hi Doctor, Me and my wife had a condom break while intercourse and she immediately took a Postpone - 72 (1.5 mg) within 2 hours of the act. Its been 6 days now and she felt bad back ache, nausea and headache. 1. Is the drug causing this as a side effect after 6 days. 2. She is on anti epilepsy pills like levipil, will this affect the functioning of the Contraceptive and hence she is pregnant now? 3. What is the sure symptom of pregnancy and when to do a pregnancy test.