Weaning off- incorrect diagnosis

Context, I was diagnosed with bipolar 2 at the age of 17, I am now 25. Many therapists suggested that it’s not the correct diagnosis, and it never really felt right for me so I started seeing a new psychiatrist. So, I’ve been on 200mg for 8 years, along side latuda and abilify. Long story short my “bipolar symptoms” were due to ptsd. My doctor has a plan for me to be off all three medications in 3 months. I’m kinda of freaking out about how that’s going to go for me but I really want to be off of them. Anyone with a similar experience? I’m worried mostly about the lamotrogine.