I felt incredibly sick all of the first trimester because I was taking progesterone. I got to stop at 13 weeks, and with that and first tri ending, I expected to start feeling wonderful. I actually felt the worst between 13-16 weeks, and noticed an improvement around 17/18 weeks. As the sickness wore off it was replaced by bad rlp and back pain (enough for me to have to wear a support band around week 21, and get referred to a PT).
But- the pain better than feeling sick! (unfortunately the 2nd tri energy never came for me!)
My OB said most women feel better around 16 weeks, if that helps... I'm hoping I was just an extreme case. I was thankfully on summer break, so was able to sleep and do nothing. Tried ginger everything, the pregnancy gummies, sea bands- none of those helped in my case, but others swear by them. The only thing that I noticed a slight improvement with was actually meeting the recommended 3L of water a day.
Good Luck!