HELP!!!

Im so fucking stressed right now. Im trying to plan a wedding but my mental health is really playing up now. I dont feel like a good mother and Im not even sure if I still want to get married. My fiance will not listen to anything I have to say. from were he is sitting we are getting married an thats all that needs to be said. But he wont help with the plans plus his ex found me on facebook and has told me a lot about him. he says its all lies but I dnt knw to to believe as he has lied to me b4. Help killjoys what do I do?

I know I want my wedding to have an MCR theme but where the fuck do i start? My fiace wont agree to if as he isnt a huge fan. Xx