hello,am having problems while having sex with my partner.while doing sex my organism becoming weak and am so upset that am not getting satisfaction, that am worried why my organism getting weak,is there any problem with me.can it has a solution to it.another we  had sex first time and i came inside her,actually we had sex after her periods is over,the next day so,am worried that might she get pregnant  or not,she told that v had sex at date 8 so she can't get pregnant,but  am worried.can u help me in this problems