please help.. PE Problem

hi Doc, i think i have same problem here. but a bit deifferent i think.
im 28 5feet 9 inches. in relationship not yet married.
i do masturbate also but occasionaly only. but stop already this lately.

and here the problem.i think it started 2 years ago. I saw adds, a pills that can make it bigger and last longer. i tried it. and i think since that time i feel i doing sex wihtin 1or 2 - 5 mins top. but im not quite sure if my problem from that medicine. (beofre i dont have sex problem)

my guessing is stress factor. why.. cos im doing bruxism also which is cos by stress also.
and also im guessing, since i doing sex within 1 - 2 mins, that thought keep running in my head so it always like that.

and also i think maybe my penis's head too sensitive.

for now i tried already graphites 30c for 1 weeks now. dosage 1 cup of the bottle (small bottle)
after 1 week i try again graphites 6c. dosage
2 pills twice. now i stop..

Your guidance and help is greatly appreciated, thanks in advance.

add info : i quite smoking 1 year already, sleeps min 6-7 hours.

sorry for my bad english.