Hi L.,
First of all, it is my understanding that if you live in Illinois you are entitled to half of the shared marital assets, including your spouse's 401k. I am not an attorney, but I believe that is the law. I urge you to contact the Lilac Tree, which is a non-for-profit organization in Evanston that exists entirely for the purpose of informing divorcing women or those contemplating divorce. They have a seminar a couple times a year called, "Divorce University" which is a full day of information from attorneys, judges and counselors. They also offer support groups so that you can connect with others going through what you are going through. Please remember, knowledge is power, and the more you understand about the laws in your situation, the better off you will be. It seems like your attorney is not doing a very good job informing you. Here is Lilac Tree's info: ###-###-####; www.lilactree.org.
Regarding the post of "TF", you did not say whether or not you are a SAHM, but staying home to raise your children IS work. If that is where you are, then you have sacrificed a potential career to do so and you deserve to be compensated for that, at least until you are on your feet which could take some time.
Finally, although divorce is not easy for anyone involved, it can be the best thing if there is no working out your differences. Kids exposed to their parents' fighting can be more damaging than the two of you splitting up and finding your own strengths apart. You can ease this transition for them by staying connected to them and talking to them--not by bashing your ex but by checking in with how they are feeling and reassuring them that none of this is their fault. Do your best to keep your arguments away from their ears and work on this as gracefully as possible.
Best of luck to you--you are going to be ok.