GERD. My story

I am 22 years old. I don't smoke or drink. Growing up I can remember having a slight hoarse voice in the morning if I ate to late at nights. But never anything too miserable. It would go away within a hour after drinking water.
March 2011 on a Wednesday. I woke up with a hoarse voice that never went away. After a few weeks I started to get slightly worried so I went to my family doctor. I went 3 times over a course of 5-6 weeks and they had no idea after giving me multiple steroids and antibiotics that did nothing. I also had no pain in the beginning my throat didn't hurt at all. My only symptom was the voice. So they sent me to a throat specialist. (Audiologist) He did a throat endoscopy and told me I have GERD. He prescribed me omeprazole 20mg once a day. I changed my diet. I stopped eating hours before I went to sleep. I have never been a soda drinker, I am not a fan of fatty foods. The fattiest thing I like to eat sometimes is chocolate.. So I gave that up. I don't eat big meals. I have always been a snacker. But I didn't seem to get that much better so back as planned in 6weeks. He told me to start taking it twice a day. my throat started to hurt and become really sore around this point. I would wake up in severe pain, and it would hurt through out the day. I would take 2- 20mg omeprazole and I would also drink baking soda mixed with water whenever I couldn't handle the constant burn anymore.. I wouldn't drink the baking soda/water at the same time as taking the omeprazole. I made sure I did that hours apart from one another.
So about 10-12 weeks later my symptoms got much worse. It wasn't working. Nothing seemed to work.
So I went back to the doctor. They did another endoscopy and my throat is more swollen than the first. It's starting to swell up even higher around where my thyroid is.
I started having chest pains and it has become hard to swallow anything.
My heart rate gets insanely high in random occasions.
I feel a knock/thump whenever I swallow.
My throat is always hurting.
I am nauseous when I eat.
It's painful to eat or drink anything; I have lost almost 30lbs because of it.

So I have had a endoscopy twice now,
I got a barium swallow done and he told me I have acid reflux. probe test done,.,Blood work....How many more test need to be done?
I haven’t heard my voice in a year now. It's to the point where I am becoming depressed and I ignore talking to people. I ignore hanging out with friends, because if I talk to much my throat becomes incredibly sore to the point where I won't be able to sleep. I can't yell or whisper. I have one tone. If I yell then I’m pretty much out for the rest of the day because my throat hurts so badly.
I am thinking about going to the Mayo Clinic. Has anyone else been through this? Do you think they will be able to help? Could it be something else?
Im desperate.