Pride flag in my shared classroom

I am a speech therapist new to a school in a liberal public school district. My classroom is a tiny closet sized space that I use 2 days out of the week. The other days I go to another school and a different speech therapist uses the room. The other speech therapist has a small trans pride flag in the room and also a pride flag on the outside of our door. It makes me incredibly uncomfortable to use the space as my office, bringing in kiddoes that see the flags and knowing teachers can see it too. I don't want people to think that I support gay marriage or that I am gay. I've tried to ignore it but the space is so small that I see it all the time and it makes me upset that it looks like I'm promoting something that goes against my conscience. I almost never see the other therapist because we work opposite days.

The small flag I could just hide from view and put it back when I'm done working, but what should I do about the much more noticeable pride flag on the door?