Dry vagina after kids?

`Styne

Anyone else have dry vagina issues after having a child? I’m 16 mos post partum and I’m dry as hell usually a week before my period i get so dry even wiping after using the restroom hurts my OBGYN says it’s “PMS” and the only way to treat it is birth control. Which I feel is bullshit I feel most OBGYNs push BC as a cure all for anything and it’s not? Is my vagina just broken? Is there any special tests I should be asking for or medications to help?