Hi everyone, I need some advice (terrible speller btw!)

Im 25 years old and was born with a medical condition called MPHD, Multiple Pituitary Hormone Deficiency,

When I was about 23 I started to get very bad heartburn and acid reflux and just constant nausea, but was able to control it with 30mg Lansoprozole  but for the past 5 months it has been out of control, ive been vomiting after eating because pain in chest is so bad and food wont stay down, cant sleep at night because acid is so extreme, been put on ranitidine and omnaprazole 300 mg and 40 mg and still not really touching pain, cant bend over had to change my job because of it.changed my diet lost a stone and  Stress of it is making it worse.

Had endoscopy showed up nothing! Had ultrasound on gallbladder all clear, Just don't know what is going on. On other medications also for my hormone problem, hydrocortisone and thyroxin and growth hormone,

any suggestions please?