The MMR vaccine contains live virus and that's why it's not recommended by medical professionals to anyone pregnant or planning to be pregnant within a few months. I personally don't vaccinate my kids and I have had way too many vaccines in my past, both as a child and adult, that I'm seeing damage from now. HOWEVER, according to a PRO vaccine website, www.vaccineinformation.org, the percentage is very small for congenital rubella to passed on by the virus.
My advise to you is not to worry. Worry NEVER does any good. At this point you need to be investigating for future decisions so there will be no cause for worry going forward.