I forgot to get my Rhogam Shot

I’m 29+3, and forgot to get my rhogam shot. I cancelled my last appointment just because I was tired from work and it was scheduled for my only day off. I completely forgot I was even scheduled to get the shot and I’m really overwhelmed right now. Is it too late? I still feel movement and everything from my baby, Andy next appointment is on five days. Can we make it that long? What do I need to lookout out for? I need help. I’m freaking out and I feel so stupid.😢😢😢😢