Anyone relate to losing interest in sex after fertile week?

It seems like as soon as my menstrual cycle is over we get busy nearly daily till about 3 days after the lh surge is positive. We are super active through the whole fertile window and a day or two after... then i just lose all interest and i go a week to 10 days prior to my next cycle having no sex at all. Anyone else relate? Is it part of the reason we haven't gotten pregnant or am i understanding it correctly that you can pretty much only gdt pregnant in the fertile window?