well im 6 weeks pregnant and my 15 month old son has german measles, it aint the same as the mumps but the dangers to unborn babies are the same. if you have had your MMR jab then there wont be any harm to the baby as you are immune to it but if you aint had the jab then there is serious side affects to the baby. the only way to find out is when u go for your blood test for a check up at the doctors it should say on the results if u are protected or not.
i hope everything is fine, i know what it feels like to feel scared cos i was scared when i found out about my son but my doctor reassured me im fine and im hope your baby will be healthy