Missed a dose of Makena shot

I am 30 weeks pregnant and was supposed to get my weekly dose or progesterone on Thursday. Well the pharmacy didn’t deliver it to my doctors office on time and they closed early Friday. So I won’t be able to get it until Monday. I’m so nervous I will go into preterm labor after reading on their support group site that most people went into labor days after their last dose. Of course their last dose was around 36/37 weeks same as mine will be. But I’m scared missing this weeks will cause me to go into preterm labor. My first was born at 34 weeks. I’m just so scared😩

Anyone else get this shot and missed a dose and everything was fine?