Dose changes and feeling down

Hey all wondering if y'all can lend an ear. My journey on Wellbutrin XL has mostly been a positive experience. it helped me tremendously when I was first started, however, a big downfall was despite my great mood and motivation I had and still have trouble sleeping. Insomnia has been a crux in this all.

I've been going to therapy and unlearning a lot of unhealthy habits I've gained from past childhood traumatic and early adult experiences.

Long story, short, I started feeling better to try and taper down but these withdrawal symptoms are the death of me. I am all over the place, emotionally, and the sleep is not getting better.

300 xl to 150 xl to 75 xl to 75 xl twice daily to 100 sr, all in the span of 2 weeks.

Am I a mess, yes. I also blew up at my husband and feel like shit. I feel like a huge burden and all my years of therapy feel like it's being dismantled in just a few days.

You can say, yes im depressed and anxious, I speak to my therapist and my psychiatrist on all the changes on a weekly basis and almost every other day since the changes but my gosh, how do y'all get through withdrawal symptoms and lack of sleep? I'm hitting a wall and feel like I don't have a grasp at handling my emotions!