Help getting babies to move

I'm 22 and 5 with twins and over this last week I feel like I'm just starting to fall apart. I went from "we got this" to "idk how much longer I can do this" in a couple days. I have so much pelvic/hip/back pain that I left work to go to the dr bc I was worried about cervix issues. Baby A is nestled transverse from hip to hip so far down the ultrasound tech couldn't get a measurement of his head and even tried a vaginal U/S with little luck. Does any one have any advice for getting these babies to move up. I work retail and can only seem to be on my feet about an hour or so before my waddle becomes a painful hobble. It's way too soon for me to go on leave, especially since everything is good with the babies and my cervix. I don't want to burn through my fmla before they get here.