You might have Sexual anhedonia - https://en.wikipedia.org/wiki/Sexual_anhedonia
Speak to a doctor.
Even though you cannot feel your orgasm, can you still feel your ejaculation?
If you can't tell that you're having an orgasm then you might not even be having one. It should feel very good,tingly,you should feel satisfied and you may be too sensitive to touch afterwards.
If you are interested on increasing your sensuality, reading helps. A term they use is Tantric Sexuality. Waiting to climax, deep breathing exercises, fantasy. Pamela