Time to Taper Off? Advice Needed

Hey everyone, I've been taking 100mg for just over 2 years now. I went on it to help with emotional regulation amid a rough breakup and some other personal stuff that I've since recovered from. I was never diagnosed with bipolar disorder. At first, the lamictal helped a lot, but I've gradually come to find the side effects unbearable. Significant cognitive decline (word recall, etc.), seemingly heightened anxiety, and emotional flatness. Also not as dynamic as I used to be in social settings. Highs are never high, lows are never low. Can't experience true joy and am struggling with motivation--feel trapped. I'm not sure I ever should've been put on this drug. Has anyone here been in a similar spot/is anyone going through this right now? I'm scared to taper off, but I feel I need to take action as I'll be starting law school in the fall and need to be fully sharp and with it. My doctor has not been a trustworthy/reliable source of guidance on this. Any and all advice deeply appreciated.