I’ve had this dull achy pain in my lower back on the right side for a couple days now. It’s a bit worse tonight though. When I lean forward or bend it the opposite of arching, like cow pose, even just laying down and tilting my hips inward, it hurts really bad. So I’m assuming it’s a muscle or tendon because the stretching hurts but idk. It doesn’t feel like an organ or anything internal besides my hip where my sciatica starts. Anyone have this before or know what it is?