Cautiously optimistic

I did a blood draw yesterday, Dec, 9th. HCG was 1753 not double but up (from.1101) previously the 1st draw was at 673 then went up to 1101.

Progesterone levels, were as follows: 1st draw 14.50 2nd draw : 12.90 and yesterday's draw: 9.20 so progesterone has gone down. My Dr didnt seem too optimistic. She wasnt too concerned about my HCG mostly my progesterone which has decreased even though I've since been supplementing with Progesterone (for 3 days now). Anyone had a viable pregnancy similar to mine?

I go in on Thursday for a ultrasound to sre if anything can be seen. I would like to add that i have had no bleeding or any unusually bad cramping. She did suggest i stop taking the progesterone and let nature run its course. Im still gonna continue taking it. Will taking ir just delay the inevitable? :(