HELP WITH VACCINE

Im 3yrs ttc and I just got some blood work done from my fertility doctor. results say im not immune to rubella so my fertility doc said I have to get the MMR shot& wait 1 month to Ttc i heard mixed things about that shot online i never got it when I was pregnant which unfortunately ended in april. My gyno after i got pregnant tested me and said she wasn’t worried about me contacting that or concerned because it’s not common in CA, but this fertility doc said I have to get it before treatment she wants me to have a healthy pregnancy when it happens,Any of you have stories of rejecting it or getting it and conceiving fine? Thanks everyone🖤im just do confused and scared to get it