Is It Safe To Take Wellbutrin During And After Pregnancy?

I have been on wellbutrin for about a year. It has ally helped me. I have tried lexapro and celexa and they did nothing. Zoloft made me severely depressed. I am trying to get pregnant. I am worried I will not be able to function and be a good mom to my 4 yr old and wife to husband without it. What should I do?