My last four pregnancies I have mostly gagged and gagged and gagged and nothing comes out, it is so full on, my throat hurts etc. I have tried skulling water, putting my fingers down my throat and nothing ever comes up. I hope it passes quickly for you, this pregnancy has not been anywhere near as bad. I had been drinking alot of raspberry leaf tea and the nausea has not been as bad. Also when I am tired or really hungry it is much worse resulting in said gagging for ages and nothing.

eat as much as you can
drink water and raspberry leaf tea(you can drink it cold if you like)
and make sure you are well rested. Hopefully 12 weeks ticks by super fast for you x