Hi and welcome to the GERD forum.
U should deff see a dr as Sassy has suggested.It is not a good think to try and dx urself and expect to feel better.
Since u have had issues with gerd for a while, and ur ear is causing issues in addition to the chest pain u may want to see if u have a sinus issue...draining sinuses can cause gerd/acid reflux.
Keep us posted on ur progress
"selma"
I pressed send too soon. I would also considered getting checked by chiropractor. I just remembered that I have had similar feelings, and it was my neck being out of alignment that caused the pain. Just an idea, but, it might help.
It could be nothing, however, I think I would see a doctor and tell him about it. You are really young, so, I suspect he will tell you the same thing, but, I would rather be safe than sorry. Blood pressure is good, but, some doctors like it even lower.