Morning sickness second trimester

Since 3 weeks I've been having all day morning sickness and couldn't keep anything down, it's been awful. I'm at 15 weeks and it seemed to slow down a little but now it's back. I've only lost weight since I got pregnant, about 9 pounds. Who else has had morning sickness that lasted this long and when did it actually end? Praying for some relief soon, this pregnancy has sucked :(