Similar experience. I took diclegis and it helped a great deal. Still had a LOT of breakthrough nausea. On rare occasions (important work events) took Zofran, which helped me get through a few hours, but also resulted in the WORST constipation.

Here's a tip: I filled the diclegis prescription several times, but it got pricey. I switched over to Unisom + B6 (same ingredients as diclegis) and had the same relief as with diclegis (although still with the same breakthrough nausea). It was much more economical - could get a bulk bottle of 120 pills from Costco for less the cost of one prescription refill. I take half a pill (they are scored for this purpose) before bed, and it really helps with the morning sickness.

Gained in first trimester, as well. Now at 18 weeks and feeling a lot better, although still taking the Unisom. Ate a lot of carbs first trimester, as it was the only thing I could stand to look at and it seemed to keep nausea at bay. Plain white rice, plain baked/boiled potato, plain pasta, plain white bread (the smell of TOAST made me want to hurl). I couldn't even stand the smell of them cooking, so hubs was great about making it while I sat in a different room -then just choked some down.

It was the most unpleasureable weight gain ever!!! Not only did I not want to gain the weight, but every meal was torture. Had to eat to keep from puking. What a crazy time! Wish it had been more fun. Also found microwavable options. Kraft Easy mac mac&cheese was tolerable. Now doing better eating some plain veggies, some meat, french toast, bagels, cheese.

I know it is misery, but it will get better.