Do not know if this will help you.
You can try and go over your routine.
.A couple of months ago I started experiencing this same problem.
And I went over my routine .The thing I changed is I made sure I did not get to much heat on my
Scrotum from the heat pad guess kinda cooking my balls .Changed the way I
Applied the heat .and the problem cleared up in two weeks.
Now am back to normal.