Anxieties about sex often mask deeper hurts and wounds that are covered over with I am not into sex or other sayings.

There are many things that can diminish libido, alcohol and meds, emotional wounds, being overtired, being in a relationship with a demanding person that does not show love or affection, and many more.

It usually is not a problem with the body, it is usually in the realm of the mind or emotions. Have you talked to your therapist about how you feel during sex and explore what might be hiding under that?