A Harvard expert shares his thoughts on testosterone-replacement therapy - Harvard Prostate Knowledge - Harvard Health Publications
Check this website that should be credible!
Your level is not that low from what I understand--for some who are having problems with the pituitary gland which controls several vital hormones is a must to replace testosterone, thyroxine etc.
You will know if it is so low with very achy muscles and joints, no energy, depressed, loss of muscle and bone mass, etc.
Go see couple different doctors, particularly an endocrinologist--good luck