middle back pain during pregnancy

Ja
I'm 6weeks and 2 or 3 days, I got pregnant immediately after miscarriage so we have to wait until the ultrasound to figure out exactly how far along I am, but I'm having really bad back pain and pain under the ribs. It hurt to breathe a little this morning because when id breathe in it'd make my back hurt worse. That stopped after a couple minutes but it almost feels like bowel spasm. You know when you are constipated and don't go for a couple days you have some back pain? That's pretty much what it feels like but I JUST FINALLY went yesterday evening so I shouldn't be having this I don't think. I'm on vacation for New Years seeing my husband's family so I can't go to the dr and I'm really nervous because I had a missed miscarriage at 8weeks. Has anyone else had this? Is it normal? Is it just gas? I'm so nervous. No spotting just really really bad back pain. It probably doesn't help for the past two days I've had to sleep on a pull out couch 🙄