MMR Booster

Lindsey
Hey ladies! I just got a new job and had to get a MMR Booster (the measles, mumps, and rudabella vaccine) and I was told to not try and conceive for 21 days after. I will sit out a month if I have to, and I'm researching it, but my fertile window will hit right about 8-18 days after it (depending on what app I go by) and was wondering if any of you know if this would be pretty safe, especially since implantation would prolly occur after the 21 days. Of course my baby's safety is number one, but this is a pretty important month in my ttc and just want to look at all options. Anyone have advice or more knowledge of this topic than I do? Thanks!!!