I'm going through that right now myself 18 weeks pregnant. I had it a lot with my first too, my second I did chiropractic care all the way through the pregnancy and only suffered the last 2 months. This time around we just can't afford it. I am exhausted from all the tossing, plus for me once I'm 'awake' I inevitably have to go to the bathroom too. So toss toss get up go pee, take 5 mins get situated toss, toss, get up---you get the picture.
Recently, I've actually put a pillow under the side I'm laying on and I lay on top of it, along with my c shape body pillow, and the rest of my pillows. Its not perfect, but I really only have to toss 1/2 as much as I did before. I tried the pillow top/memory foam topper, it worked some for the hip pain, but then my back started hurting, and then I had a hard time getting out of it later in the pregnancy.
I'd go ahead and try some additional padding and see what works. I would also think you are early enough in your pregnancy you could attempt to tummy sleep more to avoid your hip pressure pain. Good luck I'm right there with ya mama!