Morning sickness getting worse

Ja

I'm 15 weeks and 4 days. I feel so sick even worse than I did a month and a half ago. I have 3 previous children and did not feel this bad. I feel that this pregnancy is getting worse the farther I get. My round ligament pain and headaches. I just want to lay down all day any suggestions? I remember with mysecond it was hard but by this time it had got much better.