There is still hope! I felt the same way when 12 weeks came and went and I still felt terrible! Mine stopped in the 16th week. I have the random day I'll feel sick, but it's nothing like what I had, because it'll come on quickly and go away quickly (except for the random day or two). SO much better than it was- and I know people say you feel great in the second trimester- and I *finally* do relative to the first trimester, but it took awhile! When I get tired, sick, achey, acid reflux, etc., I just remember that it's nowhere near as bad as it was back then, haha!
P.S. When I got to the point I could force water down without feeling too sick, I made sure to drink lots of water, and once I started that I was feeling soooo much better all around! The days I will feel the sickest right now are the days I don't drink enough water