Girls, can anyone tell me if they had something similar, what they did…

Girls, can anyone tell me if they had something similar, what they did and how they coped? I'm 23 weeks pregnant.... I have these kind of pains like pulling sensations in the pelvic area and legs in that same area.... by evening it hurts so much that I can't get up if I lie down, when I walk it's fine and sitting is normal... What could this be and should I see a doctor? This is not my first pregnancy but I haven't experienced anything like this before. Maybe it's the bones spreading apart? If so, why at such an early stage?... girls, waiting for your answers. Thank you all in advance.