I'm an NFP teacher and the male sperm reaches the isthmus (where the uterus connects to the fallopian tube)within minutes after sexual intercourse. If the egg has already been released, there is NO WAY to prevent conception with a chemical contraceptive. The only thing the chemical can do is alter the lining of the uterus so when the growing baby arrives 7-10 days later he or she cannot implant in the womb.
The pope should immediately demand a retraction of this horrifying decision of the German bishops. And we need to pray hard that the Lord withholds His wrath from His people. Read Exodus if you want to see how God responds to infidelity among those closest to Him. Chastisement is not pretty! Please make acts reparation for the betrayal by these Judases.