My girlfriend sent nudes to a guy before me? Should I break up with her or am I being stupid for feeling this way?

I know most people have a past but I'm an inexperienced guy. I've never sexted, had sex, or had a girlfriend before her. She's had one boyfriend before me and they sexted during their short relationship. She told me they never went to the point where they had sex and that she's still a virgin. I don't know why but it bothers me at the thought of her ex still having her nudes and shit like that and the fact she did something like that with him..
She told me she cut of all communication with him the moment we started talking. Am I overreacting and being dumb? Should I just let this go?
Dump her
Keep her, you're being stupid
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My girlfriend sent nudes to a guy before me? Should I break up with her or am I being stupid for feeling this way?
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