Did you run a proper PCT after your cycle?
TRT can be gels, injections or pellets. If injections are chosen you should not have to go in to the doc's office for them. He would instruct you how to do so on your own. Keep in mind most doc's are not trained in hormones so self education is key for you. Know what you're getting into.
Take the time and read the sticky threads at the top of this forum. I'd also suggest you pick up a book or two to read:
"Testosterone A Man's Guide" by Nelson Vergel
or
"Testosterone for Life" by Eugene Shippen
Either book will open your eyes and begin your education for this phase of your life.