Vaccinations

I'm doing work placement soon, and I have to vaccinations so I can work there, I need hepatitis a and mmr because I'm borderline with mumps but measles and rebella I'm fine with, my doctor told me to wait 3 months to start ttc after the mmr vaccination but I called the women's hospital and they said that the doctor was abit out of date because the new research is to wait 28 days after the mmr vaccination, do you I should wait the 28 days or 3 months. I had a mc in April and really wanted to start ttc again