Booster jab

I forgot I have to sleep on my left side as I’m 36 weeks now and I asked the doctor to administer the jab on my left arm 🤦🏻‍♀️ but then if it’s on my right arm I can’t do things effortlessly (due to arm soreness) since I’m right-handed. So now I have to sleep on my painful left arm rather than risk lying on my back 😩