German measles vaccine

So, apparently i was never vaccinated as a child and have never had german measles. After 6 months TTC ive just had some blood work done and the above has come to light. Dr wants to vaccinate me now but then we have to put stop TTC for about 4 months and then be tested again for immunity and hopefully green light again. Questions is, does anyone know what complications etc there could be if i do go ahead or if i dont? My head is telling me one thing but my heart the other :(