anyone else feel like a 90 year old?

I've had so much discomfort in my lower back that I can't even bend forward, even with bending my knees it's uncomfortable. Sometimes if I sit for a little while (30+ mins) and I get up, I can barely walk. At the end of the night, I can barely move in bed because my lower back is so stiff. My chiropractor says it's because I'm not working out -- but I do workout and after my workout the pain is worse. It's like when you tell the dentist your gum bleeds when you floss and the dentist says you're bleeding because you don't floss 🙄 someone please tell me this is another normal but unwanted pregnancy symptom. I'm 12 weeks.