Hi Kabeerah, Ramadan Kareem :)
Wow, still having morning sickness at 4 months?? That sucks! Have you tried
sea-bands? They are little bracelets that press on accupuncture points for nausea. They're great on boat trips as well as for morning sickness. They also make these ginger containing candies called Prenancy Pops. I know a lot of women swear by them. You could also make a warm ginger tea by using fresh ginger root.
Peel a 2 inch piece of ginger and slice it into thin slices. Add it to boiling water, cover the pot, and let it simmer for 10-15 minutes or so. Strain the tea and sweeten it with honey or sugar. You can also add lemon.
Here's formal instructions:
How to Make Ginger Tea or Tisane - wikiHow
As for the ginger ale, most ginger ale these days doesn't have any real ginger in it.. so it could be the carbonation that is having the effect. I'd sip small amounts and see how your band tolerates it. I know that when I have a lot of restriction, the carbonated beverages don't sit well with me.