If i have gynecomastia always tired and a small penis could that be hormone level imbalance?

It's possible: Gynecomastia with low levels of energy and small genitalia could indicate a low level of testosterone. An endocrinologist could help you determine if that is the cause. Gynecomastia is usually trusted by a plastic surgeon once other medically treatable causes are ruled out.

Yes it could be: You could have a low level of testosterone. At your young age, you certainly need to have this checked by your family doctor asap.