Low testosterone/Erectile Disfunction.

Hello Sir/Mam, I am not sure if I have ED. But the symptoms are matching with low testosterone and ED. Like thin hair, hair fall, mood swings, low sex desire, erectile dysfunction, low appetite. I have started following natural solutions for this problem like, taking proper sleep, weight lifting, basic kegel exercises, having boiled eggs daily, garlic. As per online we get lot of measures for this problem, but I would like to know the best solution for the same. For that I have few queries. 1. Is there any specific testosterone test I have to do to know where do I stand? 2. Do I need to have doctor's prescription for performing the test? 3. Can this be cured naturally by changing day to day habbit or I have to consult a doctor? 4.is there any other natural solutions for this? Kindly help me in finding out solution for this problem. Thanks Bhabani