Is it ever TOO LATE to do HCG and then clomid/nolva afterwards

the reason I ask is previously I never did HCG, i always just did cllomid and nolva

but my last cycle shut me down hard and the clomid and nolva didnt help

its 3 months post cycle now...can i get some HCG and give it a shot

tryin hard to get my testes back workin...been expericening ed for 3 months