Feeling depressed

I have been smoking for several years. I am a hard smoker and now I understand that it harms my health, especially now, when my husband and I begin thinking about a baby. I decided to quit cold turkey of course, but now I realize that it is a hard way. I feel upset and depressed. I read several articles and found on the one site ( VapingDaily) gives some information about easier ways to quit, but I am not sure that some of them are effective. So I am anxious and don't know what to do. If anybody can give me advice I will be thankful.