Yes, you can get tested now. However, check with your insurance and get prices ahead of time.
I have had cats my adult life - so for about 17 years now - I am 36 now. I was 'tested' as part of my routine OBGYN blood work when I got pregnant. When my levels came back elevated, they sent me to Weber OBGYN, specialists at the Harrisburg Hospital. From there they took more blood and sent it to a lab in California. It takes some time (if I recall like two weeks) for it to come back. The more specific tests told me that I did not get it while pregnant and had it for some time aparently... which is what you want, you do not want to get it while your pregnant.
What happens is it is a parasite. Your body never gets rid of it, but builds up the ability to fight it. You don't want to be fighting it as a new issue when you are pregnant, but if you already have it your baby shouldn't be impacted or affected.
Of course, read, read, read, and get all the info you can from the doctors. It is very scray when you hear all the problems it can cause for an unborn baby, but being informed is the best way to deal with it. Know that the tests are very expensive (like $700 I believe), but certainly worth it if you have the money and can gain the peace of mind.
VERY IMPORTANT - and you don't need to be scooping the litter boxes to get it! When the cats leave the litter box, they can carry the parasite all over the house... you can still do the litter if you wash your hands after! And, you can get it ever if you never go near the litter!
Best wishes!!!