Hi Ashley --
I can't say what's likely in your case, but I have NERD, and that's what stalled my diagnosis for over a year. The first two ENTs didn't see anything when they scoped my throat, and the first GI didn't see anything of note during my first EGD. Also, LPR symptoms will frequently cause edema, or swelling, and not erythema, or redness -- further complicating a visual inspection. Redness and erosions don't usually appear until the reflux has been allowed to impact the tissues unchecked for a long time.
I've heard of doctors proclaiming the LES as "fine" with just a visual inspection, and it makes me angry to hear this. They say this because of the way the LES "grips" the endoscope when they turn it around and look upwards from inside the stomach. This diagnosis doesn't consider the other 23.75 hours in the day when it may be relaxing at inopportune moments, etc. At the very least, however, you can rest assured that his visual inspection didn't see anything obviously suspicious.
I wouldn't describe your LES as "blown", necessarily. A barium swallow might provide some helpful information at this point. Manometry = quantifiable pressure data, and barium swallow = real-time, visual observation of swallowing action, position of LES, and possible minor abnormalities.
I'm really surprised that your doctor didn't install the Bravo during your EGD...unless you had one of those new un-anesthetized endoscopies. Actually, in your case, and if it's available to you, I'd go with the impedence test instead of the Bravo. Cheaper and more information, but unfortunately uncomfortable.
If/when you have pH monitoring, remember that the values it provides may not have direct relevance to your symptoms. If you're experiencing LPR/respiratory reflux, even a small amount of "normal" reflux can cause symptoms.