Am I Just Bad at Sex?

So my fiancé and I have just started having sex in the past week. He seems to really really enjoy it and it's great for him, but I on the other hand just can't seem to orgasm. It's even been painful or uncomfortable sometimes. We tried prolonged for play, lubricant, and multiple different positions but nothing actually feels good. The only time I've been able to orgasm is by clitoral stimulation and it's only happened 15% of the time. I'm really sad and frustrated about it because I want this to be good for both of us, but it's just not working for me. Any suggestions?