Hi there ~
I understand your concern. You have to get a physical examination done by a surgeon. If that is normal you probably have no problem with your physical penile appearance. You have a very common problem of erectile dysfunction
and / or premature ejaculation
and it can be easily treated with medications available during this time. The class of medication is called phosphodiesterase 5 inhibitors (PDE5Inh) selective serotonin reuptake inhibitors and it also helps with decreased libido which is a result of depression
if you are going through one. I advise you to consult with a qualified psychiatrist
who might be able to help in this regard. I hope this helps.
Take care and have a lovely day!