Hi.Welcome to HEALTHCARE MAGIC.. I have gone through your query and can understand your concern. It seems like you have premature ejaculation, Which is condition in which ejaculation occurs with slight stimulation & lot early than desired. loss of erection after ejaculation is a normal procedure, the problem is you are ejaculating early. Most cases of premature ejaculation do not have a physical cause & have psychological factors such as anxiety, guilt,etc. Men often learn to control their ejaculation with sexual experience & in most cases it doesn t require any treatment. Following steps may be taken -Relaxation technique- Don t stress more about ejaculating early.Have communication with your partner to stop during over-excitement. This will help you delay ejaculation. - You can try a different position during intercourse. sometimes a different position helps to reduce stress related to premature ejaculation. -Counseling/behavioral therapy help reduce anxiety related to premature ejaculation. -There are also creams, gels, and a spray that may be used to treat premature ejaculation by reducing sensation.These medicines are applied to the penis before sex. condoms with pre-applied gels are also available in market. Don t worry you would be fine Hope this information helps.