WHO Missed Pill Protocol -- Weeks 1 and 2:When $\geq 2$ consecutive hormonal pills are missed (i.e., $\geq 48$ hours since a pill should have been taken):
- Take the most recent missed pill immediately (discard others).
- Continue remaining pills at the usual scheduled time.
- Use $\textbf{backup contraception}$ (condoms) for the next 7 days.
- Consider emergency contraception if unprotected intercourse occurred in the previous 5 days AND pills were missed in Week 1.
Option analysis:- Option B (take all 4 at once): incorrect -- causes nausea/vomiting and is not recommended
- Option C (abandon OCPs): too aggressive; mid-cycle discontinuation is not advised
- Option D: matches WHO guidance -- continue the pack AND use additional contraception
\[\boxed{\text{Continue current pack + additional contraceptive method}}\]