Welcom to HCM.
Ideal interval to collect semen is between 3-7 days. Semen collected before 3 days abstinence and after 7 days abstinence will not give the correct value. It has to be collected in clean, dry wide mouth container without any chemicals or lubricants, preferably by masturbation
within the premises of laboratory. If any of these conditions are not observed your semen may be consider as invalid/ improper. Try once again after 15 days with an abstinence from sex for thee days.
Better luck. Dr SM