To be honest girl, its probably that you're feeling more yourself. Girls dont belong in the mens locker room... you're feeling more intune with your soul now your body is begining to match.... the thoughts come to the fore more easily....
Frankly, my gender dysphoria got WORSE as I transitioned.... a male body with a penis was bad, but a female body with a penis? god... thats a real mind fudge.... Tbh, i felt really awkward in the boys changing room at like mmmm, a few months in? I know i was me, i was breaking out of my shell and feeling things i hadnt when it was repressed... things change, your view of the world more than anything. Do what you feel is right hon, your comfort is the most important thing.