In the latter case, there are several possible culprits. Some of them are a change in work schedule, medication changes, a death in the family causing grief, or a loss of support system from friends or family. Let your husband know that you love him and that you are committed to improve your sexual relationship. Working together and being mutually supportive will be helpful in reducing the tension and finding a good solution. It is seldom fully accomplished in the months immediately following the incident.
Most victims have 'flashbacks' to the incident, especially at specific moments during sex.
What you need now is a good therapist who has been trained at helping rape victims. You and your therapist will need to look closely at whether you are even aware of these flashbacks and what you can do about them if and when they occur. It may be that you did go to therapy back when it happened. But therapists have learned even more in recent years about how to help people who experience such trauma. It is bad enough that you were hurt on the day the rape occurred.