You'd have to see a urologist, I recently went in for the same issue, too much sensitivity and I can't hold out long enough. She prescribed a lidocaine / prilocaine cream, you apply it and it numbs you down there so it reduces the sensitivity and so you can hold out longer. I tried it and it's pretty effective major difference from how I am without it. However, it's awkward putting it on, you have to saran wrap it for 15 min for the cream to work.
There's another way to be able to hold out longer which is through SSRI's we tried the cream first but, I have a follow up appointment in a couple weeks and I'm going to ask if we can try SSRI's it would be way more convenient and easier to just pop a pill and not have to deal with the cream but, I'm not sure how well it will work if sensitivity is the issue but, worth trying.