anyone on weekly progesterone/Makena shots to prevent preterm birth?

Sara
My doctors have suggested I would be a candidate for Makena/17p treatment since my son was born at 36 weeks (I am now 8 weeks with #2). They said it is weekly shots starting at 16 weeks. For those who have taken it, did you do the shots at home or at your Docs? What happens if you travel and can't do the weekly shot in the usual place? Did you tolerate them ok?