600 IU 2x per week, sub-Q from the beginning of the cycle until the end should do it, then taper the hCG while taking Clomid after the cycle.
There is some impairment of estradiol production as a function of hCG during T use, but it is only after T has been used for a period, then hCG is introduced. Don't know what would happen if both were started at the same time.
See:
Matsumoto, et al. Human chorionic gonadotropin and testicular function: Stimulation of testosterone, testosterone precusors, and sperm production despite high estradiol levels. J Clin Endocrinol Metab 56(4): 720-728, 1983.
Have your E levels checked about 36 hrs after a dose of hCG while on a cycle. Then you'll know if there is a problem or not.
2000 IU is too much, probably down regulates the receptors in a short period of time and that is why the effects were short-term.
W6