Have you been able to orgasm at all? I mean, like in your private time? That's where you start in this case I think. Learning how it feels so you can help get your body there during sex. You might want to talk to your husband about this and see if he's cool with you ordering a dildo (order online for privacy if you want).

Tell him that you want to climax with him but that you need to teach your body how. Use the dildo and get yourself there. It's kind of like overcoming a mental block (get it, overcoming..ha). Once you orgasm with the dildo, you'll be mentally more able to climax with his penis. I just think you've gotten used to not climaxing with his tool and you need to prime the pump.

What do you think?