17 weeks and throwing up

I just turned 17 weeks today. For the past week I haven't been able to eat as well as I should because I feel so nauseous every time I eat anything. I've been throwing up after I eat and that's the only way I feel better and my stomach doesn't feel as bloated. I also feel like I have a knot in my throat and it's hard for me to swallow. Morning sickness ended for me at about week 11 . Is it possible for it to come back? 😩😩😩 currently miserable!!