Anyone else not able to swallow?

I have bever been able to swallow cum much less have it hit the back of my throat. I want to be able to do that. But at the moment I literally can't. I will vomit. Not because I don't want it. My body will reject it. I have recently discovered how to make my man squirt his precum and when it hits the back of my throat I come very close to vomiting. Not always though. I think it depends on the angle. I have opened up my throat over time though and I can get his dick all the way back now with some occasional gagging. I used to have a very sensitive gag reflex but that has improved over time. So what I'm trying to do is get some advice or insight or whatever. Has anyone ever been able to swallow after working on the gag reflex and will i ever be able to?