Toddler making life impossible

I work from home and recently getting extremely behind on work, sleep, house chores, both our hygienes, phone calls etc. He screams and throws tantrums all day, yelling NO, bossing me around. He doesn’t allow me to talk on the phone, work on the computer, eat, shower, etc. He goes to bed late and wakes up very early and yells at me to “STOP SLEEPING” then cries and throws tantrums in the morning. I feel like he hates me and is bullying me which I know isn’t true but life has got so hard now with his behavior. When I try taking him outside he starts yelling that he wants to go back inside and never let’s go of my leg that I cannot walk or move. He fears trees, birds, the outdoors, baby pool etc. We have a 2.5 year pediatrician check up next week I’ll bring it up to him. I feel like I’m going to explode 🤯 I want to smack him or give him high dose of Benadryl but I know that’s not the solution and it’ll cause more harm than good.