Low Progesterone Anyone?

Angela • Just found out I'm pregnant in my 40's, and as thrilled as I am. I'm a little terrified also. My husband doesn't have any children and I have a 16 yr old from my first marriage. Praying good things for each of you on this journey. Blessings. 💕😊

Anyone still get a temp spike with very low Progesterone? I just found out today that my Progesterone is very low (0.9 tested 8dpo), but I had a temp spike on cycle day 15. I read online that anything less than 5 means likely you did not ovulate. So if that's the case - what would cause my temp to spike and stay up for several days? Any info? Anyone have a similar experience? Thanks in advance.