Toxoplasmosis

I have 3 cats, but they all live indoors. We adopted my youngest cat 6 months ago. 2 of them don't have their shots yet. I tested positive for toxoplasmosis the other day, so they had to run another test to see if it's an active infection. Do all of my cats need to be tested for toxo? If I was exposed to the infection in June (6 months ago,) would it be a risk to my unborn child? I'm 8 weeks pregnant. Thank you!!