Is it too late to take plan b pill on day 4?

Yes, it is generally considered too late to take the Plan B pill (levonorgestrel) on day 4 after unprotected intercourse, as it is most effective when taken within 72 hours (3 days). However, there is another emergency contraceptive option called ulipristal acetate (Ella), which can be effective up to 120 hours (5 days) after unprotected sex. It's important to consult with a healthcare professional for guidance on your specific situation.