Welcome Caupon, I'm sorry that your mother's cult persona is being sooo uncaring to you because you made a very intelligent choice not to serve a dangerous cult that uses BITE control techniques to victimizes JWs.
You will understand a lot more by reading Steve Hassan's books (i.e., "Combatting Cult Mind Control", "Releasing the Bonds: Empowering People to Think for Themselves", and (his latest book) "Freedom of Mind: Helping Loved Ones Leave Controlling People, Cults and Beliefs"), visiting his website www.freedomofmind.com, and watching videos on his website. If you don't have money to purchase Steve Hassan's books at least watch the following videos or checkout the books from a library near you: (2003) Steve Hassan explains SIA method to rescue a loved ones from unhealthy situations, NY Ethical Culture Society February 2013 (41:09), NY Ethical Culture Society 2010 (40:56).
The most important things that you can do are to make your plan(s) for what you want to accomplish in your life, do not allow your mother to pressure you to become baptised unless you are convinced that it is right for you, post on JWN to vent your frustrations about your mother and to help you to execute your plan, and to research the WTBTS as much as possible. Have you visited www.jwfacts.com, www.jwsurvey.org, www.freeminds2.org, www.watchtowerdocuments.com, and www.freedomofmind.com?
You are young and have the rest of your life to enjoy, even if for the next several years it will be very difficult for you because your mother's cult persona will try anything to pressure you to get baptised. Just remember that your mother has to persona's - her cult persona and her authentic persona who you love.
Peace be with you and everyone, who you love,
Robert