It appears to me that your acid reflux is starting up again. If you have not done so already, and it gets worse, I would see a gastroenterologist to rule out any serious problems.
you maybe pregnant but most likely your just getting sick
It sounds like it, my stepfather has this same issue. The other thing it could be is a stomach ulcer, which I've heard has much the same reaction- I have a bleeding stomach ulcer and while I've not experienced gagging as you're describing I do occasionally get a burning in my throat located in the base of my neck (front side).