Hello I believe I can help with your concerns
I am so sorry that you may be suffering from the symptoms of borderline personality disorder (BPD), I can imagine how distressing this may be for you.
You can add the Lamictal to your current medication regimen, but usually Lamictal is a treatment for severe depression, resistant depression, or depression associated with Bipolar Disorder. While it will help with some low moods associated with BPD, it will not help with the anxiety and anger component associated with BPD.
Here is a link showing the no interactions between the Topamax, Wellbutrin, and Lamictal for you
The abilify can help with the anger outbursts and the mood swings, but there is a risk associated with it when you use it in combination with the Wellbutrin
Well the abilify can be at a low dose to still be beneficial and can be used still with the wellbutrin. The abilify can cause weight gain, but if it is at a low dose it most likely will not cause this and this and your dosage of the Wellbutrin actually promotes weight loss.
Its okay no worries. The topamax is already a mood stabilizer, like the Lamictal, so if you want to go on the Lamictal, I would suggest removing the Topamax. Then you can take a low dose of Abiligy (5mg) with the wellbutrin, and lamictal if that is the direction you want to go. You can take both the Lamictal and Abilify at the same time if you like.
Taking the abilify and wellbutrin together puts you at a risk for Serotonin Syndrome, but this is negated if you are taking a low dose of the Abilify.
No you are not being too concerned with your weight. Well Topamax already increases your body temperature and sweating, and this can increase with the Abilify, which can lead to heat stroke in some individuals when these medications are combined. You can still use the medications together, but you have to be weary of heat stroke and drink plenty of fluids before exercising.
Here is a link explaining the heat stroke concern I mentioned and the Serotonin Syndrome as well with the Wellbutrin and Abilify
I understand why you want that and you definitely deserve feeling better. The DBT book you are using should also be beneficial to you as well as this is the best therapy modality for treating BPD.
I would also recommend this DBT self-help website too
Anytime, I am always happy to help.
My goal is to provide you with excellent service, so if you ever have any further questions or concerns please do not hesitate to contact me at anytime.