Rumer Willis feels like a "force" has taken over the "control panel" in her brain when she struggles with her anxious thoughts

Posting on her Instagram story, she explained: "I get nauseous and my heart won’t slow down. It sometimes feels like a force so much bigger than me has taken over the control panel in my brain ... I have to catch myself when I find myself focusing on just wishing it was somehow different. So here I am, sitting here feeling like I’m gonna melt, even though I know I won’t and just trying to lean into the discomfort as scary and painful as that is."

Meanwhile, Rumer previously admitted she has "worked tirelessly" to love herself.

The 'Once Upon a Time ... in Hollywood' star shared: "I have worked tirelessly since I was a young girl to love myself, love my body, my face. To not allow the negative commentary from others about how I look to affect the value I hold for myself. This is my version of healing. I was saddened yesterday by the amount of comments I saw yesterday that really missed the point of what I wanted to share. This is not about sex, it’s not about staying relevant or garnering attention. I truly could care less about those things and to be perfectly honest I don’t have the time or energy to waste on that bulls*** ... It felt like this was about putting myself, with all my own personally perceived flaws or things I feel insecure about and be willing to show up vulnerably and authentically. To share my journey with it and practice what I share by putting myself out there which is very scary for me after so many years of being shamed and judged and ridiculed for how I look. Having my self esteem decimated as a teen by bloggers and anonymous commenters spewing negativing and hate in my direction. (sic)"