I took Wellbutrin XL, I didn't gain any weight. The primary goal of DB is for you to feel better and help you to gain healthy mechanisms to deal with the situation. Keep venting, if your IC is not the right one, may be just find a friend willing to listen to you a few days a week...
Piecing takes months or even a few years. Like you I wanted to speed that process and each time I tried, it was a mistake. Live your life in the present, enjoy the moments you can have with him and your kids. Love is based on attachment not passion, it's a step by step process too.
Keep those acts of kindness and keep your anger under control, anger is destructive and it doesn't show you under your best. They liked OW because most of the time they were sweet and stroking their egos, I know it was a fantasy relationship but it felt real for them, it brought them pleasure and a positive outlook about themselves. During piecing, they are still on the fence and missing those feelings. I noticed every time I "acted" as OW he was responding in a positive manner, I know it [censored], but at least he was happy and I could feel him moving closer. Believe me some days it was tough to act like that, but I had my eyes on the bigger picture.
Big hugs
Me 52+ WH 57+ Married 20 + Piecing since 2016 (ready to give up...)