Answer
(Fatwa: 265/245/B=1432)
First, you should go through Unani treatment and get your menstruation period disorder cured. You should keep on reciting the following dua extensively:
رَبِّ لَا تَذَرْنِي فَرْداً وَأَنتَ خَيْرُ الْوَارِثِينَ [الأنبياء : 89]
Hadhrat Shaikh Zakariya (رحمة الله عليه) had suggested the following practice:
Boil two eggs in the morning and after peeling them write the following ayah on one egg which the husband would eat:
وَالسَّمَاء بَنَيْنَاهَا بِأَيْدٍ وَإِنَّا لَمُوسِعُونَ [الذاريات : 47]
While, on the other egg write the following ayah which the wife would eat:
وَالْأَرْضَ فَرَشْنَاهَا فَنِعْمَ الْمَاهِدُونَ [الذاريات : 48]
This should be done for forty days without any gap, and during this period you should have intercourse time and again. It is hoped that you shall be conceived.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband