How can I make her happy?

We were gonna have sex with my girlfriend but she suddenly felt dizzy and stuff so we stopped. I asked her if she's okay and told that its totally fine we dont have to rush things out and stuff (its her first time by the way) she started crying and told that she's sorry. I said you dont have to feel sorry and stuff but i feel so bad for her like how can i make her happy?
How can I make her happy?
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