Rubella igg and igm positive low avidity

I just began my 18th week of pregnancy. I got my regular tests done 4 days ago. My rubella igm was 2.0 and igg was 23.92. I was later advised to get the avidity done which came to 28.74%. I have not had any symptoms of fever or rashes or anything else. I do not remember if i have ever been vaccinated for rubella. I think i got it 7 years ago when i had rashes all over the body and had fever and also eye infections and was admitted to a hospital for 2-3 days. But i am still not sure about if i had rubella. Now i am very scared about the current situation. Any advise would be really helpful. Did i already have antibodies and whether they will protect the fetus as well or did i have rubella recently and will the fetus be affected by it?