Errectile Dysfunction. Considerably!

I am 45 years healthy male with no major ailments - Like Diabetes , Cholestrol , BP etc . Last couple.of months I have witnessed a low sexual desire and inability to have hard penile errection ... This is causing me worry .. I had got my testosterone count also done which were 2.2 but nownit has come up to 6 ... I have 2 children and have never faced this issue . I did have a shoulder slip disc issue and was on nerve relaxant for some time...but haven't been on them for last almost a year .. I am even not waking up with an errection I am concerned about my condition--- I am doing Kegel Excercises, Jelqing and applying Himcolin Gel from Himalaya and tried Modula 10 mg for my condition.... I have been under some stress in last 9 months but levels have gone down considerably