I [23F] had a strange dream. Should I share it with my girlfriend [23F]?

I want to start by saying how much I love my girlfriend—she truly is the most important person in my life. Throughout our relationship, I’ve never been attracted to anyone else. However, there’s a coworker of mine, whom I’ll refer to as F, who has been showing me an unsettling amount of attention. She sometimes touches me in ways that feel strange and even jokingly claims to be my girlfriend. The odd part is that she knows about my girlfriend because I talk about her all the time, but that hasn't deterred her from her advances. It’s not even in a respectful manner, which I could have accepted. This has gotten to the point where I’ve confided in my girlfriend about it, and we’ve been discussing how to get F to stop without me having to confront her, which makes me nervous. Recently, I had an anxiety dream that’s been bothering me. I often have these dreams, but this one was particularly jarring. I found myself back in high school at a science fair at my girlfriend’s school, and my mom was furious with me. She created a group chat with all my friends and family to express how disappointed she was in me. The strange twist in the dream was that my girlfriend was portrayed by F. Although F wasn’t the main focus of the dream, I still feel guilty for not questioning it while I was dreaming. F is not my girlfriend, and I’ve never viewed her that way, yet perhaps her odd behavior at work impacted my subconscious. Should I tell my girlfriend about this dream? Would she be upset if she knew? I’ve been contemplating whether to bring it up, but I worry it might be a silly thing to do. I feel terrible about this situation and as if I’m failing as a girlfriend. I would appreciate any honest advice on this.