Semi colon and comma; help breaking up list

Hi there,

I feel that there are too many commas in this list and that a semicolon is necessary somewhere yet I can't ascertain where to put it. Can you please help? The sentence is as follows:

"Sleep deprivation, coupled with the distress of being unable to ascertain the well-being of my partner, compounded with the anxiety of taking the GRE, led to my lowest ever test scores, despite numerous timed, practice GRE sessions."

Many thanks