Hello ma'am

I have a delayed period due to the use of a ipill. I had taken it 3 times I'm the last year with a gap of one or Two month, but now I have a delayed of period of 4-5 days how much should I wait , but my boyfrnd told that he had not ejacuated .
I had taken ipill just one day after period over . Is there any serious reason or should I go for medical checkup but my mother will come 2 know about that . my periods delay is only 4-5 days should I wait one more week .