I've not had any experience with Toxoplasmosis but did want to caution you if you're not already aware that the organism can cross the placenta and affect your baby, which is why all women are advised not to handle any litterbox duties while pregnant. The organism is transmitted through feces, so you/your baby are not at risk during just petting, feeding etc, your cat.
Some info on Toxoplasmosis:
http://www.vet.cornell.edu/fhc/brochures/toxo.html