Had sex for the first time today, not as excited as I was as a virgin

Hi i am m 22, had sex for the first time today. I suddenly got soft while penetrating her and it embarrassed me, similar thing happened 2nd time so had to jerk off in order to get the cum out.

Can someone help me in this, i am disappointed in myself and embarrassed and don't wanna have sex anymore.

Considering i have ED what can I do to permanently cure it?

Edit: as per the opinion of majority i don't have Ed I am just nervous