Side effects from Saw Palmetto.

Hi Doctor , I took saw palmetto 500 mg for 1 month and beta sitosterol 120 mg for 1 month in 2016 June , after that I found 0 libido I stopped immediately , since then I'm having same problem , 0 libido , no desire , small testicle and small gonads , I don't have erection problm if I want to do masturbation I get erection , I visited urologist and endocrinologist , Dr gave me Tadafil for erection, but that didn't work , as I don't have erection problem .. my current Testosterone level 3.9 ng/ml , my sugar test , thyroid test , SHBG all are normal .. But I don't have libido , I can't ejaculate , what should I do ? Is it reversible ? Should I take TRT or hCG therapy ? Or should I do hard workout under sunlight ? Thank you .