Hi 12345,
There is more information in post #2 here that may be helpful with identifying and minimizing temperature regulation issues.
There is also more about wool mattress pads and toppers in post #8 here and the posts it links to.
I would tend to look at the mattress protector you are using along with your sheets and bedding first because these can have a significant effect on temperature with the least possible effect on the feel and performance of your mattress.
Thicker and more breathable mattress pads and toppers (especially made with natural fibers) can also help but they will have a more significant effect on the feel and performance of your mattress.
Phoenix