Can't Sleep At Night

I'm at 30 weeks now and I can't sleep at night. Maybe sleep for 3 hours, wake-up at 3am and from then, I can't sleep at all. I get sleepy when I'm at work. Haiz. My baby is quite active at night. Cant get a proper position. I turn to my side, she will keep moving. Sleep on my back, I feel breathless and getting headaches. FYI I had the maternity pillow and it's Doesn't help?. Heeeelpp..