Within 3 0 days before school starts COS for converting the visa

You need to file for a change of status while you are in status. You cannot take up student status until you are within 30 days of starting...

My mother is a green card holder and she is been out of the US for over 2 years, how can I get her back to the united states?

since your mother went to the Embassy to seek permission to return to the United States, and the Embassy took her card, and subsequently returned...

H1 and H4 processing at the same time for spouse

The H-1B and H-4 should be filed as early as permissible 6 months prior. On your wife's H-4 indicate that she is seeking an H-1B and her H-4...

Once a B1 Visa status has expired is it possible to get married and change the status after?

Yes

Can my husband cancel my green card and force me to leave us without my son?

You have several options for remaining in the US either with or without your husband. From your message there does not appear to be any physical...

I assume your B has already expired. If it has you are out of status. Once you are out of status for 6 months to 1 year you will have a three bar...

Should i be worried?

This question appears to be one for a domestic relation atty rather than immigration.

Citizenship denial??

If you have filed your income tax returns as required and do not owe any money for back taxes this issue should not prevent you from naturalization.

My wife’s job contract is going to end June next year. She has J1 visa, any options for her to stay here.

You appear to have options for your spouse. You should have a full consultation with an attorney at the earliest opportunity

I falsely claimed US citizenship in 09 and 10, Now my green card application has been denied what do I do next ?

There are some defenses to removal. They are difficult to secure but possible. Contact an attorney as soon as possible.