Like PacRakMG mentioned, you can have your immunity tested for it. Many people with cats or that are around cats a lot have contracted it at some stage (most without knowing) and are now actually immune to it.

Funny enough, before having kids I was a surgical vet nurse for many many years, so I was with multiple cats every day. Would you believe that my immunity came back negative? Lol. After all those years of exposure to cats I still hadn't contracted it. Once I was pregnant I was just really careful. It's really not terribly much of a risk if you are vigilant with cleaning. The disease requires 1-5 days incubation before it's infective, so as long as you clean litter trays at least daily the risk is minimised. Also, cats generally get it from eating raw meat and rodents, so outdoor cats or cats that are fed raw meat by their owners are most at risk. If you have indoor cats and don't feed them raw meat the risk again is even less. Once a cat has had toxo it also builds immunity, so it's not common for a cat to get it more than once. So basically, as long as you take precautions, it's extremely unlikely that you would catch toxo from your own cats.

Did you know that you are more likely to get toxoplasmosis from eating undercooked meat than from a cat during pregnancy?