Hi

I had the same thing happen a couple of years ago when we first started to ttc, had the bloodtest and my immunity was low so I just had another jab no questions asked. I remember having my original shot when I was in grade 6, but that is 20 years ago now so I figure it must have worn off. It's well worth being immune, my Mum and Aunty both caught rubella/german measles when they where pg at the same time many years ago and had terrible complications, suffice to say, the reason I didn't ask any questions and just had it done. 3 months does fly by.

Good luck!