instantly lose erection when trying to use a condom during sex /u/Traditional-Angle900 Sex

Me and my girlfriend have just started having sex and she’s the first girl i’ve had sex with. i have no problem getting an erection around her or staying hard during oral sex. but the moment we’re about to have sex and i even try to put a condom on i lose my erection and it takes a long time to come back, if i do get it back up i finish really fast. i’m not sure why this happens because ive tried masturbating with a condom and i was perfectly fine. this didn’t happen to me the first time i/we had sex but now it’s happening. i don’t know if it’s me worrying i won’t be able to satisfy her or if there’s something wrong with me.

Me and my girlfriend have just started having sex and she’s the first girl i’ve had sex with. i have no problem getting an erection around her or staying hard during oral sex. but the moment we’re about to have sex and i even try to put a condom on i lose my erection and it takes a long time to come back, if i do get it back up i finish really fast. i’m not sure why this happens because ive tried masturbating with a condom and i was perfectly fine. this didn’t happen to me the first time i/we had sex but now it’s happening. i don’t know if it’s me worrying i won’t be able to satisfy her or if there’s something wrong with me.