Dear Querist
My opinion on your queries are as under:
1. If she files a case against me using 498A or DVC act, what will be the consequences?
Opinion: If she filed any cases against you u/s 498A or DVC then there is no direct arresting, first of all the matter will be send to women cell and the official of the women cell issue a notice to you for your appearance where you have right to submit your reply against the complaint filed by her, the women cell official will try to settle the matter between you, if not possible and there is a case made out against you as per the complaint then after approval of DCP the refer the case for registration of FIR. after registering the FIR, you may file an Anticipatory bail before session court or high court and get the same on merit.
2. If i want a file a divorce now, how do i do it and does Indian Law allows me to do that as she is pregnant and will give birth to baby in a couple of months?
Opinion: As you are muslim, you have right to pronounce talaaq to her infront two witnesses or Qazi without any interfere of the court/without filing and case before court for divorce.
3. What should i do to get my baby from her?
Opinion: if she is not ready to live with you and also adamant to not to allow to visit your child then you have right to file child custody case before family court where the child is residing under Guardian & Wars Act.
4. How do i protect myself and my family from her before she files any cases using 498A or DVC or some other law?
Opinion: you may file a information cum complaint to higher authority as NCW/Commissioner/SSP of your area, or you may file a complaint before District Legal Service Authority for settlement.