severe gerd

I am a 40 yr old female who has been suffering from acid reflux/GERD for the last 7 yrs. I have switched medications (nexium, prevacid, omeprazole) and now most are ineffective. I weigh 100 lbs, my height is 5'2'. I have not gained any weight in the last few years, but can lose it very easily. I exercise regularly.
I have been following Dr Joe DiLivera's advise posted on the forum for Natrum Phos 6x (4 tabs thrice daily) and Arnica (in mineral wtr 1 hr b4 meals and b4 bedtime).
Initially, i got a lot of relief, but now the symptoms are back especially in the morning:
Acidic taste in mouth
Sore throat/ cough
Dry mouth and thirst during the night
Bad breath during the day
Symptoms worsen when fasting (once a week)
No constipation, ocassional gas, stomach ache on right side


I drink 1-2 glasses of water on empty stomach after I wake up.

I have also been taking Pulsatilla 30 (1/2 hr before drinking water) to treat cervical spondilitis pain that has been there for 10 yrs. Pulsatilla has been effective in preventing and suppressing the pain, which kicks in only if i bend my neck excessively.

Please advise what I can do to improve my sitaution quickly and effectively.

Thanks