4 year old with separation anxiety

My 4 year old has a heightened separation anxiety, if she can’t see me in the room she calls out and if I don’t respond, she gets panic. She’s expressed that she’s afraid I’ll go away without her. Despite having a talk about it and reassuring her, it continues. We co-sleep and she wants me to lay a specific way to cuddle with her. If she won’t feel me in bed she wakes up. She’s literally driving me insane that she’s controlling my every move. I have 2 other toddlers that need to be looked after as well. She also has a hard time sharing me with her dad- my husband, or talking to other people. It’s become so overwhelming, I broke down crying and yelling at her to just let me be. Hubby says maybe we need to evaluate her but I think it’s just a phase- even though I’ve been saying that since she’s 6 months old. Is this too much and normal for her age? Should we evaluate her?