What do you mean when you say you don't feel like you are getting the most out of them? Are you injecting the correct amount of T, at your scheduled time and injecting all of it at that time and in the correct spot and way for the type of shot you are doing (IM or sub-q)? If so, then the part where you don't think you are getting the most out of them is very likely all in your head. If it would make you feel better to get someone else to do your shots, then go for it, but it really seems unnecessary for anything other than peace of mind.