No orgasm yet

So I’m 18 and I haven’t had an orgasm yet. I’m getting worried as to why but I have a feeling it’s because our sex is always planned out 🙁 I don’t get that horny or wet when it’s that way and it’s in a vehicle most of the time. It’s good but I’m just not as turned on when I’m expecting it and I feel like foreplay is always rushed. Advice please?