Hi, Nani,
I can't offer much more than what people have already said - that your anger is COMPLETELY understandable and normal, that you will impove day by day, inch by inch, that you will get through this tremendously horrible time of your life, and that this is a great place to VENT. Your circumstances are incredibly stressful right now. A month after I was diagnosed, I ended up in ER with a roaring case of mastistis, except I am 47 non-nursing. So while I was spending all my time seeing neurologists, I also had to see a breast surgeon, have mammograms, sonograms, etc to rule out a very scary type of breast cancer. In the end, it turned out to be truly a very odd case of mastistis. I didn't fit in any of the categories for getting this, but I did and it was probably due to the stress. Then my mother-in-law had two strokes, had to have her leg amputated, and finally passed after a month struggle and my husband also lost one of his dearest friends at age 58. I kept thinking, "are you kidding me, isn't a brain tumor enough?!?!!???"
You also have a sick child which is the most stressful thing I think a mother can go through. Truly, deeply, scary. So all I can offer you is my prayers and support and a vitual hug and hand holding. Please keep us posted. You do need to take care of yourself which I know probably seems like an impossible thing with both your child and your mother needing you too. But you really need to heal. Journaling might be a great way to get all those mixed-up feelings out. I hope Lexapro helps take the edge off of all of this for you.
I am thinking of you...check in often
Cheryl
PS I also would add that I have read several threads of people going on to have second or more children post AN and did not get another AN or have regrowth. Someone had their An diagnosed during their first pregnancy and was afraid, but did not have any issues. I would get a second opinion on this. Each pregnancy is different also hormone-wise. While the pregnancy might possibly have caused your AN to spurt grow, I doubt that the pregnancy caused the AN.