My OB said you can take pops/the mini pill within 3 hours and you'll still be protected, but i've seen some people say it has to be within like 30 minutes or you're screwed. Which is it??

Also, i've read that the time of day you take them affects the efficiency, because they work the best between 4-22 hours after you take them, but i've never been able to take pills in the morning and I always remember them at night! So is it bad if I take them at 8 p.m. and then have sex around 10 p.m. or even 11? Please help!!