There are mouse baits that are child/pet proof. I bought one a couple of days ago because I found evidence of mice under my bathtub. Make sure you get rid of them and don't come into contact with the mouse droppings. There are some serious illness you can contract from mice and you are more susceptible since you are pregnant. You may want to think about a professional exterminator. Good luck.
I have a Siberian husky and she catches the mice that get in the house, my dog possible thinks she's a cat.. I found some interesting ideas from googling it.. It wouldn't let me copy n paste any if the text but here's a URL I found
http://m.voices.yahoo.com/how-catch-mouse-without-deadly-traps-poison-or-2724060.html
Good luck!
Take some very strong double sided tape, stick it to your foor or surfaces where the mice are, put a little cracker or sumthin on the tape &' wen the mouse walks across it will get stuck (provided your tape is strong enough) they also sell traps that are nothing but sticky &' the mouse can't get off (very inexpensive) &' they have no poison on them .. that's what we used .. good luck
I tried being nice to ours and now I have a large issue. They mate like crazy. The sound things don't work. The bucket thing doesn't work. Just spend 5 bucks get ten traps put peanut butter on it then be done.also look at your dryer vents and for any holes larger than a dime.fill them w steal wool.