Remember you are now at war. expect and try to prepare for the worse things she will be throwing at you
Telling her you talked to a lawyer was a very bad move. This probably already set you back another 10 steps in an already uphill battle, you better hope she doesn't file divorce before you do(hello Mr. defendent), if so expect restraining orders and such (hopefully not but it seems like she planned this divorce well before and baited you, so expect the worst)
like others have mentioned, DO NOT move out of the house unless a court orders you to, and for the 100x time, SEEK COUNSEL!!!! talk to all the best ones you can find asap, a father friendly one, don't be afraid to change lawyers or get 2nd opinions
document everything, keep a detailed journal immediately and all of it secure in an off site location (nobody but you and your lawyer should know about this), start gathering any incriminating information on her and protecting any that might be on yourself, go to 007 mode. Start doing more stuff together with your kids, get involved with parental networks, witnesses that can say you are a superdad, you need witnesses, alot, preferably professionals (schools/parental related/medical). If a custody fight comes your way, you need to be prepared the show/prove that you are the greatest dad in the world. At the same time building your case to show any patterned behavior that shows her to be an unfit mother in any way.
Again repeating what SludgeFactory said, stop showing her your cards. Go through everyday like nothing is going on, don't let her even think about you planning anything(probably too late since you told her about the lawyer part). Do not get into arguments or fights of any kind, record conversation when/if possible. This is not a time to be nice, you will get screwed if you do.
Try not to be alone with her at any time, she can stab your back at any time when there's the smallest opening (domestic violence charges/restraining orders) Do not make any "deals" with her even if it seems like in your favor. do NOT give or sign anything to her
again document everything, and store any documents like bank statements, tax returns, stock portfolio info, etc etc away in a safe location. change the passwords on everything. becareful on anything "joint" (credit cards, bank accounts, car/medical insurances etc etc)
get rid of any evidence that you've posted this thread, get this deleted if that's possible. get counsel, gear up and prepare to fight dirty for yourself and for your kids, G'luck
friend of mine been through this, not pretty... ( all the steps of "lets settle this without a lawyer" etc etc)