Premature ejaculatory disorder or rapid ejaculation is more to do with the mind than the body maybe you are very anxious or are over excited or have performance fear. There are many good treatment options available today for premature ejaculatory disorder and erectile Dysfunction so just relax, taking stress is another cause too.
I would advice you to consult a good competent certified sexologist with experience for advice and treatment which will definitely solve your problem plus there are a few techniques which you can practice to control rapid ejaculation these need time to master and also they are drug free so you don't need to worry just consult a good sexologist.
Next Steps
Consult a competent sexologist
Health Tips
Not to get anxious and mastrubate two hours before sex to delay premature ejaculation