feeling trapped

hey so last night after hanging out with my gf she wanted to try this thing where we roleplay i dunno like an authoritarian relationship or something. she was the boss and it started off kinda fun but then it felt really weird like she had all the control and i couldn't do anything. by the end i just felt real down and trapped even though nothing bad happened. don't think she meant to hurt me but it's been gnawing at me all day.