Side effects of medication

I was on Kesimpta for about 9 months. It wasn’t working so my doctor switched me to Mavenclad a month ago. I am not sure if the things I’m experiencing are related to the medication or just my MS. I had some issues when I stopped the Kesimpta. My body was confused not having it. But now I feel the worst I’ve ever felt with my MS. I’m so much more fatigued than I have been in the last year. I feel dizzy sometimes and get brain fog. I can tell my energy is low. I’m not sleeping well at all. My heart rate has been elevated for weeks according to my technology aids. I just can’t rest enough. I don’t know what to do. Work is a struggle and all I do is sit at a desk. I’m having more pain too. I’m not sure if anyone has experienced this coming off Kesimpta or going on Mavenclad. Please let me know your experience with either one.