If this has happened to you, I recommend you get a powerful body massager, like the Hitachi Magic Wand. Use it two or three times a week, for about six minutes. You may want to use it through your panties or use a quality lube to protect your skin.
When you first start using it, you may not feel much, but with time it will begin to break down the scar tissue and wake up your nerve endings. Use the vibrator for short or longer periods of time based on how you feel. Do these sessions for six to eight weeks and you should feel some response. Essentially, you are doing physical therapy on your pelvis.
If you once had more sensitivity and now have less, I want you to think about what has changed in your life that may be the cause of less sensitivity. New medications or withdrawal from medication, for example, can inhibit sensation. Emotional wellness and physical wellness can also have a huge impact on your sexual response.
A few other suggestions might be to expose your clit a little more during sex play. Open yourself up a bit by pulling your lips apart or pulling your clitoral hood back toward your naval.
You might want to try a peppermint oil based clit gel. Take a tiny dab and rub it into the tissue around your clitoris. A pussy pump might also help engorge your clitoral area and light you up a bit more as well.
Most of all, don’t give up on your beautiful body. Play, explore, and you’ll find your pleasure.