this may seem like a dumb question!!

Bunny • ttc 4 years with 2miscarriages. Rainbow BABY GIRL born 3/10/18💕🌈 Gorgeous girl#2 born 02/19/19💕💕 baby #3 due 03/01/21
so ive had two miscarriages & i also didnt ovulate very good on my own (but did have weak ovulations) both pregnancies my progesterone was always borderline & even on clomid it was always barely over what they wanted. ive been thinking about using progesterone cream after ovulation but not sure if its safe to buy it over the counter. anyone know where i can buy it or any tips for me! i wont do it if its not safe but i figured extra progesterone couldnt hurt