After ovulation. Basal temp. Progesterone.

I didn't chart my basal temperature for most of my ttc but recently started and noticed that my temp isn't spiking after ovulation like it's supposed to. I've been reading that it's a sign of low progesterone which I then read I have a lot of other symptoms coinciding with low progesterone. I bought some progesterone cream and talked to my obgyn, my obgyn said it wouldn't matter at this point but I feel differently and have read differently that the progesterone is important and I should apply my cream twice a day after ovulation until the end of my cycle to help chances of implantation.. Anyone had personal experience with this? Could my basal temp being doing this for other reasons?