Do I need new doctors? :(

Autumn • TTC since Aug 2015. Currently pregnant with rainbow baby due in October 2019.

Okay so question. My CD 21 progesterone was 4.. about 3 days later I found out I was pregnant. Confirmed through blood work as well. Well fast forward today and I am bleeding again with light test lines now. I think I am having a MC. I have bled the whole time. My progesterone that was taken on Thursday came back today at only 5. I have never been offered of given progesterone or anything like that. I am infuriated and blaming my MC on that. Do I need new doctors???? I'm so mad and upset as I feel this could've been prevented. What are y'alls opinions???