Progesterone shots?

Ashley • Pregnant with baby number 2! 👧🏻👶🏻 And it's another baby girl!!
Hi! I am currently 12 weeks and 5 days pregnant! My previous pregnancy I went into preterm labor at 24 weeks due to an injury to my belly, they were able to stop it. Later at 31 weeks I went into preterm labor a second time, there was no injury, but some stress. They kept me for 3 days and did the steroid shots and everything, they weren't able to stop my uterus from contracting so they put me on Procardia. I was 4 cm at that time, and was placed on bed rest until 36 weeks. I was 4cm all the way up until I hit 40 weeks, I was induced on my due date, also due to the fact I had to have surgery 2 weeks following because I was also diagnosed with Papilary Thyroid Carcinoma while I was pregnant... 
My current doctor is talking about starting me on progesterone show at 16 weeks, id like to hear some feedback from some of you if I can. I don't know to much about it yet, but after reading my story, what do you guys think? Yay or nay to progesterone shots?