ya, normal starting dosages is 100mg biweekly or 200mg biweekly depending on your total testosterone levels and patient considerations. From there they Adjust the based on bloodwork about every 6-8 weeks.

It could be millions of things. I'm sure sometime in your life as a youth you had that feeling and i'm sure it wasn't because of testosterone. Don't jump on the bandwagon.

Maybe you're just sick? ever think that you could have just caught a bug? Could be caused by stress at work that isn't allowing you to get REM sleep which makes you feel rested. It could be a change in diet that is altering this. Many factors are involved with a person feeling sluggish.

If you're concerned it's hormonal, go to the doctor and have your levels checked. Simple as that. That will at least prove or disprove if it's hormonal.