Hi
Welcome to HCM and thanks for your query.
If you are able to ejaculate into the vagina, that is good enough to make her pregnant.
If the early discharge is so bad that the discharge happens outside, even before entry, you have to take
medical advice.
There are some erection enhancing medicines that can be got only by prescription.
Both the problems can be sorted out by a consult with a
urologist.
Regards
DR GS