Coming off medication

Annette • Just got my bfp with our rainbow baby 🌈
I am currently nearly 10 weeks pregnant and since finding out my doctor has been weaning me off my medication. I took 10g quetiapine everyday for bipolar I'm now down to 50mg but am nervous when I come off it completely as it's really helped me but I know it's dangerous to be taking it in 3rd trimester. Anyone else going through/been though this?