Morning after pill

Saffron • A little girl with dreams is a woman with vision ✨ CJS 15.11.2019💙

How long should the morning after pill affect your periods?

My close friend took one last month, she then had her period which was slightly earlier than expected but expected due to the pill she took..

But now she is nearly a week late for her period this month. All tests are coming back negative.

She’s very worried and confused, is it possible that the pill has affected her cycle for this long? Should she wait it out and keep testing? Or request a blood test?

Does anyone have any personal experience of this