Praise be to Allah, the Lord of the Worlds; and may His blessings and peace be upon our Prophet Muhammad and upon all his Family and Companions.
It is known that premature ejaculation of the husband prevents the wife from getting sexually satisfied. It is also known that the fact that the husband does not take this reality into consideration as well as his negligence of endeavoring to meet his wife's sexual desires contradict the good company that Allah imposed on the married couple.
Allah says: And they (women) have rights (over their husbands as regards living expenses, etc.) similar (to those of their husbands) over them (as regards obedience and respect, etc.) to what is reasonable." (Al-Baqarah 2:228)
He also says: "And live with them honorably." (An-Nisa 4:19)
Reported Abd Al Razzaq narrated Anas that the Prophet (Sallallahu Alaihi wa Sallam) said: "When the husband has intercourse with his wife, he should be sincere with her. So, when he satisfies his need before she does, he should not hasten her." There are marriage etiquettes that should be observed.
These etiquettes include wearing perfume or eau de toilette before intercourse. Aisha may Allah be pleased with her, used to wear perfume for the Prophet (Sallallahu Alaihi wa Sallam).
Also, before intercourse, other actions that arouse the desire should be done, such as kissing, hugging, etc. They also include not removing the male sex organ from his wife's vagina until She gets satisfied, etc.
Anyway, we advise you to keep on reminding your husband of the suffering you undergo because of the failure to satisfy your sexual desire. You may also let him read this Fatwa. Finally, we advise your husband to seek the help of the doctors, specialists in this field. May Allah ease all your matters.
Allah knows best.