jalilma wishing you the very best on your scan, can't wait for an update!
TTC74 could be that your uterus is starting to bulge a little bit and push on some nerves maybe, could potentially be an effect of relaxin, or maybe even a bit of round ligament growth affecting nearby muscles. Hoping they can give you some answers and relief. I get sciatica starting at around 16 weeks because I have a retro uterus that bulges into some nerves and for me it's hip/back pain and spasms. It's no fun, hoping you aren't in the same boat!
As for me, MFM ultrasound in 5.5 hours and I'm freaking out. It's been two days since my big bleed and I'm still getting dark brown spotting. I guess I'm pretty scared of what the specialists will find. I've been checking on baby daily with the Doppler and he/she seems fine, so hopefully I will get a simple explanation for what happened.