The doctors couldn't tell you anything for you to try? Maybe there is a way you can enjoy other sexual activities like oral, romantic massages with oils. And maybe get him a flesh-lite to use.
Did the doctor or therapist say why they thought you were experiencing pain do you have a physical problem . http://www.redbookmag.com/love-sex/advice/sex-hurts-yl thats quite interesting
http://www.vaginismus.com/vaginismus-symptoms I suggest giving this a read and doing some research on your own. Much love.
find a different doctor! really. if it physically hurts it is probably a physical problem. it also could be nerve damage, have you ever injured your back? if you are using a dildo is it the same size as your hubby? you might try to find something bigger, we are designed to stretch. not all orgasms are earth-shattering, but im sure you will have one of those eventually, it doesnt sound like your doctor is trying. HE probably doesnt care, and thinks you just dont like sex, and are looking for an excuse. kick him in the nads before you kick him to the curb. also, fellatio is not terrible. i know some people dont like it, but i think its fun. and its nice to turn your man into a grateful puddle. do they make desensitizing creams for women? that might help. the best of luck to you dear.