Thanks for your patience!
Unfortunately you won't be able to remain in the US under your current visa, you would have to qualify and apply for another visa.
The reason is because the current visa you are under is only for the spouse and children of an E2 visa holder. Hence, after a divorce you would no longer qualify.
Once your son is 21 years of age, he can then apply for your citizenship. However, I assume that may still be many years from now (if your son is a young child).
Other visas you might qualify for are under the EB2 visa category. This includes certain professionals in special fields, for which there might be a shortage in the US.
The other potential option would be to take your son with you once you do leave the US, and have him return with you to your home country, but that may be a separate custody issue to be decided between you and your husband.
You can also return from time to time on a B2 tourist visa.
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