Have been feeling totally exhausted for a few months , excessive sleeping , no energy ! I am 62 years old , have received testosterone shots for low T by GP for a little over 4 years ! I work 6 overnights per week in a physcically demanding job as well ! The shots really helped my overall outlook , feeling for the first couple years , not so much the past year , if any ! I had a physical last month , my lab blood work came back excellent (doctors words ) We discussed my sleep , and was referred to a sleep specialist , i did not follow up on that simply because i don t have a problem sleeping , all i am doing is working and sleeping! We did not discuss B12 shots , wondering if that could help ?? I did have a vitamin D shortage and usually do in my blood work , so i started on a vitamin D suppliment ! Any suggestions or am i simply just getting old ??