I’m getting worried

So first I’ll say I am 33 weeks pregnant about to be 34 weeks. I have this pain that’s in my left upper rib. Like under my shoulder blade but not too close to my shoulder blade? The pain is like a Charley horse in my back. It’s very localized. And I sometimes have other localized pains in my back ribs or front. But mainly in this one spot on my left back rib. I went to the ER 3 days ago for it and having slight shortness of breath. They refused a CT scan cause I had gotten one not too long ago. Like the radiation team just straight up said no not happening lol. Which made me really nervous because what if this is a LE in my lungs??? They did an ultrasound on my legs and saw nothing so the dr said “since there’s no clots in your legs, you most definitely don’t have one in your lungs. Especially cause your oxygen is good and everything else is reassuring” also yes my d-dimer was 1400 which I guess is normal to have an elevated d-dimer in pregnancy. Anywaysss I’m just wondering has anyone else ever felt this before???