I can relate to your "sensation in throat" almost perfectly! I was doing some research online by doing a search for "gastric reflux--lump in throat" and found this wonderful message forum! So...I am having the same symptoms as you and went to my dr several months ago and he gave me nexium. I took it for a week or so and it went away completely. It stayed away for several months until about 2 weeks ago. It comes and goes--i will have it for a week and then no sign of it for a few days, then it comes back. I am a fairly healthy eater--i watch what I eat and am very concious of not eating a lot of fat (which I have read triggers it), etc, etc.
Like you, I have what feels like a 'lump' in my throat that I can't get rid of! It doesn't hurt, it is just annoying and I feel like I have to try and burp all the time to help 'relieve' it. I describe it as a lump/'flap' that when I burp it 'opens up' and then 'flaps back'. I know, very strange, but I don't know how else to describe it. I feel like if someone was to take a scope and stick it down my throat they would find something just sitting there and not moving on down the 'throat track'!
anyway, I think I am going to go back to my dr next week and see what he says. I have been taking nexium for about 2 weeks-- 1 in the morning, 1 at night--this is what my dr prescribed several months ago when I had it then and it went away. It is not going away now and I am taking twice as much as I did back then! So, all this to say I feel your pain and let's keep in touch and I will let you know what I find out from my Dr. If anyone else out there has any ideas, please let me know!
Thanks!