21 weeks today and my hips are killing me!!

So, to be fair, my hips have hurt since about 13-14 weeks. And by hips I mean where my SI joints are in the back. They have hurt if I lay flat on my back on a hard surface (like the sonogram table 😞) or if I've been sitting too long and get up. Today though... Ouch!! I laid down in bed half on my side half on my back for like 20 minutes, I just got up to pee one last time, and almost feel because my right SI joint hurt so bad... Is anyone else experiencing this??? Will yoga help at all?