His is totally disgusting but I let me dog out in the backyard. I was with her the whole time but she ended up rolling in cat poop from a stray cat we have in the neighborhood. I had to pull her up out of it and got it all over my hand and arm. I immediately washed off and gave the dog a bath but now I'm worried about Toxoplasmosis. What should I do? I'm freaking out, I'm 10 weeks pregnant.

You can always ask about having a blood test done, but odds are quite low for becoming infected in the situation you describe. Most people who become infected, will do so by eating contaminated food without realising it. Your odds are decreased even more by the quick washing up. For the peace of mind, let your doctor or midwife know of your concerns.