Hello There. I can understand your concern. i can give you only general advice. have a high protein diet and lots of fruits and vegetables. start off with foreplay and take things slowly, when in intercourse if you feel you are about to ejaculate, stop for a few seconds and then start over again. avoid smoking and alcohol intake. do some pelvic floor strengthening and core strengthening exercises. consult a sexologist in person for further help in this regards. best regards, Dr. Anil kumar jain.