<human>: Provide a brief overview of the text.

I've been dating my girlfriend Brianna (21/F) for a couple of months now. Up until today she's been pretty respectful of me aside from the occasional moments when we're sarcastically bantering back and forth.

Early this afternoon I received a couple of text messages from my girlfriend saying "Good thing Sara has been entertaining me" with pictures attached. The pictures were crudely drawn doodles of me shirtless or naked mocking something I said or our actual relationship itself. They appeared to be drawn in the margins of some notes. Now I'm all for a bit of ridiculous fun every now and then, especially when stuck in class for hours on end, but I feel like this is being done at my expense. Maybe I'm overreacting...

New relationships tend to be fragile things so I don't really know how to bring this up with her without sounding like I'm blowing it out of proportion. I sent a message back saying "That was pretty rude" and politely cancelled our evening plans for the night. I'm unsure if I should escalate this and bring this up to her in a serious manner or just blow it off.
<bot>: Girlfriend and her roommate were doodling pictures of me that I considered somewhat disrespectful. How do I handle this without looking like a psycho?