Jan 2022 edd covid-19 vaccine

Hello! My due date is on 12/01/2022. I was supposed to get a vaccine last Friday but prior to my appointment I gave my gynae a call to check if it’s ok, she said better not and asked me to do it after I give birth. Which then I cancelled the appointment immediately. I’m not too sure why because I’ve read in alot of mummies group and word of mouth that lots of pregnant ladies had taken the vaccine and they are all ok. I’ll be going for my 16th week check end of this month and I’m going to ask my gynae again. But as for now I think I will just follow her advise.