I've missed my period but the pregnancy test came came out to be negative. I have been trying for a baby. How long should I wait to go to the doctor?

There are a number of reasons as to why you might miss your period. It may not always be due to pregnancy. http://www.womenshealthmag.com/health/late-period You may want to give yourself more time before taking another pregnancy test. There's no point going to the gynae unless the pregnancy test is positive.