Second Trimester and Still Sick

I've had morning sickness since week 8. Tried several different nausea meds until found one that seemed to work, the full dosage Diclegis 4x a day. The last 2 weeks have been great, I had an appetite again and gained back the 3 lbs that I lost. Then about 3 days ago when I finally got close to 2nd trimester (I'm currently 14w1d) it seemed as though the sickness came back with a vengeance, even while taking the medicine. Before I would be constantly nauseated and rarely vomit, well the other day it was non stop nausea and vomiting. I'm so scared that this will continue throughout the whole pregnancy. I'm absolutely miserable and that really depresses me because it's hard to be happy about this blessing and enjoy being pregnant when I'm constantly sick. Anyone else still going through this, well into their second trimester? Or if it did go into 2nd trip and went away about how long did it take?