Dr SAMEER i need your help

i m 31 years old single and i never did sex in my life. but after 28 years i feel that my ereaction has been week not like before.i don`t have any problem in night discharge. but whenever i saw any beautiful girl or i saw some sceans at tv even whenever i just think about sex then a trasparent liquide come out very quickly some time with erection ans some time without erection too and if this liquide come much after that i feel 2much pain in my testeis (mostly in left testies) and that pain come in my blazer too i did talk with elopathick speciallist but he said its normal when will you merry then this problem will finish automaticaly. but realy i feel that my erection is not strong like before.
i hope i will get better advise from Dr and a very good remedy
in night i feel that eriction is ok but when ever i want to go any girl then i afraid that i can not do any thing with her therefor i don`t try. because i feel i m not strong like befor. and i also want to be sure that have giryane mani or giryane mazi ?
and which kind of food can be good for me. and i think much about sex but i don`t do....... even some time i see whenever i think about sex a transparent liquid came out without any movment of penis i wean without ereaction
and my hair are lossing day by day and i have lines in my nails of hands and some nails have black lines inside. nail of my right foot has a hole which not look nice
i hope i will receve reply as soon as possible
gr