Am I over thinking??

Tye
 I had a slip up happen and two days later I took Ella, the doctor told me that EC can mess up your period by it either being early or late. I'm supposed to get my period either today or tomorrow so if I don't get it tomorrow I will freak 😩. My symptoms after taking the pill was slight nausea, period cramps and tender breast. Guess I'm not sure why I should be worried cause with Ella I read that you can take it up to 5 days (120hrs) after a slip up and it's just as effective on the 5th day as it is on the 1st.