CPR while pregnant

Is it ok for me to be doing CPR while pregnant? I’m already certified for my job, but they got new education systems so now everyone has to re do their hands on training on the manikins. I attempted to do mine but couldn’t pass for some reason. I’ve never had issues before. I’m 8 weeks pregnant and it was just absolutely exhausting. I tried 7 times. That’s 60 compressions 7 times. It’s a lot. My boss thinks it’s a problem with the manikin and not me but they want me to keep trying later on but I just don’t want to hurt anything. I’m sore now. Obviously it’s a job requirement so there’s nothing I can really do, but I guess I’m just looking for reassurance that I’ll be fine and won’t do any damage with my pregnancy.