Foreskin Retraction. Retraction problem.

Im facing the issue in retracting the foreskin. I do not face the issue in having an erection, but i am not able to sustain the erection for a longer duration. The intercourse does not last for a longer duration - sometimes the ejaculation happens in less than a minute and sometimes in under 5 minutes. In a recent semen analysis my progressive motility and viability numbers were less than the clinical reference range. When i pull out the penis from the vagina after it becomes flacid the semen flows out. Though i am not always sure if all the semen flows out or only a part of it. It has been 8 months since i got married and i have been having regular intercourse with my spouse. Despite this there has not been any conception. My spouse does not have any medical problems and we have undertaken tests and verified the results with the family gynaecologist. Given the situation could you please recommend me a treatment plan to rectify the foreskin retraction problem.