Community medical question

Hello dr men married hon or mere shadi ko do sal hone ko hen mjhe abhe tk olad nah howa hy mene apne wife ki sari test kar wai hen sub thek hen or ek bar mere wife ne conceive kiya tha but wo drop ho gaya wo gir gai the ek he month men uske bad olad nah howa hy mere sath ek masla ho gaya hy men bohat jaldi discharge ho jata hon or ek bar sex karne k bad phr dubara sust par jata hon mjhe kuch batai kya karna chaheye