Hi I Just Got Done I Guess Foolin Around With

Hi I just got done I guess foolin around with my girlfriend we don't have sex but usually we dry hump she will have her panties on and I will rub up against her I usually ejaculate normal but today I was having a hard time. And I couldn't finish the only thing I had prior was a monster which was hours ago not to mention I work 7-4 and have school 6pm-9pm would the stress of that affect me?