I almost didn't respond because this is so
personal, but I just didn't want you to feel that you were the only one with these feelings. And by the way, good for you for waiting until you were married! How rare is that? I, myself waited until I was 21, so like yourself, I wasn't very experienced and couldn't understand why I couldn't have an orgasm during intercourse. I thought there must be something wrong with me. But I wasn't afraid to explore my body and masturbate because I actually think it's very healthy. I hope this doesn't sound too graphic, but what I discovered was, the only
way for me to achieve an orgasm during intercourse, was if I got on top and controlled the movement. But be patient, because it won't happen overnight. I wasn't actually able to experience an orgasm(during sex) until I was 25 years old! With me, it was a matter of really trusting and bonding with the person. It does make you feel so vulnerable when it happens.
As far as your husband only being able to last 3 minutes, well, that's a big problem. But like yourself, he's still inexperienced and beginning to explore his own sexuality. With time and practice, he'll get better. I would definitely talk to him about it, and tell him you want to experiment with him. Tell him you really want to know what an orgasm feels like, and he'll hopefully be more in tuned to your pleasure and what you're
getting out of it.Make it a fun little game you both play. I think the key to great sex is, you have to have a sense of humor about it. Be open-minded, and don't be afraid to try different things and see what works best for both of you. And the more you both talk about it, the easier it will get. But of course, that's just my humble opinion.
Good Luck to you and God Bless!