At your age, low-T is the symptom and not the disease. Clinic probably did not do any diagnostics to find cause of low-T to see if correctable. Can you get those labs?
Pellets are high T for a while, then drop low for a while, hard to get balanced.
Please read the stickies found here: About the T Replacement Category - #2 by KSman
- advice for new guys
- things that damage your hormones
- protocol for injections
- finding a TRT doc
- HPTA restart
You should be on hCG always to protect from loss of fertility.
Going off of TRT is expected to lead to low-T just as getting off of TRT without PCT can lead to poor recovery.
Do the reading and come back with informed questions.
Do not ignore the references to thyroid, iodized salt etc.