Hey, Im 17 years old and i seem to be hacing some impotence while sexually active. I usually masturbate 2-3 times a day sometimes even more. Sometimes i last 2-3 days without masturbating and i get random urges in school and my penis gets hard while at school. Ive been sexually active for about 2 years and ive been having problems since the beggining. My first time my penis barely got hard and it took it some time to get hard. Sometimes itll be hard while im getting oral pleasures from my partner but as soon as i start having sex itll soften up or when i put the condom on itll soften up. Other times it will be good for some time and then just randomly lose the erection and just stop working. Ive often got it working pretty good but end up ejaculating pretty quick. I try thinking about other non-sexual things when im about to ejaculate and sometimes it helps but other times it doesnt. Also after my first ejaculation my penis goes straight down and it wont work anymore. I recall a couple of times that i waited about 5-10 mins and it was back up. Are there anythings i can do to help with my impotence? Any information is appreciated.

Thanks.