Hello. I have described myself like this before - I think it's normal because, it feels like someone or something, indeed, is taking over one's body and mind, well "it" does. Did you know that brain scans of people with bipolar disorder actually differs from those of 'normal' people? I is scientific and biological and not spiritual. Or this is my conviction anyway. I actually had someone pray for me and however much I believe in God, for me it's better to pray for healing "By the stripes of Jesus we are healed!" than for removing an unwanted spirit inside of us. I hope this helps. I stick to my meds cause it's working but I know that I'll only ever be completely healed by God! Good luck and remember that God didn't 'allow' this (or broke it) but He can fix it. It is the way of the world and it's curse that carries all bad things but there's hope!
I know what a mother says or said is important and sticks but I think your moter also only said that because she didn't understand it at all either. Sounds like she is a good observer and can may be play an integral part in you getting better x