12 weeks pregnant & low progesterone

Charlise • 💕December 30, 2017💕
So I literally just got a call from my gyno telling me that my progesterone levels were low and that I need to be on an antibiotic. Ill be 12 weeks pregnant tomorrow, I don't know if it matters but I have been having sex quite frequently lately, I read that low progesterone can cause miscarriage 
Do I need to be worried? Because I'm worried