Talk to Urologist on Low Testosterone Symptoms

Profile: 29 y/o Male, Married, No medical history

Problem: I am facing testosterone level imbalance symptoms after i got married for example Male pattern baldness, Low hair growth, dullnes in skin, frequent sickness, before i rarely get sick or infected by any viral but now i get sick very often, weak strenth, alow stamina. I am not sure what is the reason or whats going on inside my body. I want to know that to whom i should consult and what are some lab tests i should went through to check my harmones and testosterone levels.

Thank you