Makena & Working Out.

I am 11 weeks now, and I’ll be starting the Makena injections in about 5 weeks. I had to stop working out after finding out I was pregnant due to a SCH, and I just got word that it has finally cleared. I want to start my fitness routine back up, but I don’t want to increase the chances of the injection not working. I was wondering if anyone was able to continue with their fitness routine while on the shot, and still successfully made it to term. Should I put my fitness on hold until I give birth to be safe? Or have any of you ladies been able to keep up with your fitness all while being high risk and on the shot?