Please help! Awful separation anxiety

Do any of you ladies have tips?

Baby is 8 months and has been absolutely miserable lately. He’s teething so he’s been waking up constantly and on top of that during the day I cannot walk away from him for even a second before he’s hysterically screaming and crying to the point that he’s made himself throw up because he’s so upset. I talk to him in a reassuring voice and even make sure that he can see me while I’m trying to accomplish some work around the house. He’s obviously tired as well from waking up but is also fighting to death to not take naps, I feel like I’m going insane! I miss my happy baby so much I’m running on fumes here. If anyone has any advice or helpful words I would appreciate them so much