Welcome to HCM.
Your last LMP was 17th April,so you had to start YAZ OCP
from the 1st day of Cycle. You took the tab near about ovulation time and it is very wrong time to take.
Also you did unprotected sex on 4th and 5th May, so there is some chances of pregnancy
or irregular bleeding. You should have to do urine hCG
test after missed period within 2 wks.
If you took YAZ OCP in correct time (start from 1st day of cycle), it is effective near about 99%.
So wait for coming period and practice safe sex
in future if mistake to take pill.
All the best.
For more information,mail me.....firstname.lastname@example.org