advice for meds

I am getting ready to start the regular protocol, I have done this one before with my son and had great luck. I am wondering if any of you have ever taken the YAZ and Dom for more than 6 months. I stopped at six months and started pumping the first time, which left me pumping four months before our son was born. So far we have only been waiting two months and am both afraid if I don't start that I won't be ready when the baby comes and also afraid if it takes a long time that I will end up having to pump forever. Does any have any advice? Tori