I'm scared

Guy's I've a great girlfriend she's nice, sweet, caring

She's having her periods....and going through a lot of mood swings.

Yesterday I was at her house and she asked... if we could have S\*x .... honestly i thought she was kidding

And told her to have a life

Then i realised she wasn't kidding...so I just go with the flow

She was clearly upset 😭 but i realised it later

What should I do ?!! Honestly I'm scared cuz of periods and all

This isn't a mock or a joke it's very serious!!