Headache, Eye Pain, Dizziness

Hello
I have been reading and want to post my symptoms to see if someone can help me.

About 10 years ago, I started to feel sick.
It started with dizziness and lightheaded, otherworldy feelings. I often described it as me being invisible - I saw the world thru a dream state. AT this time I also started having stomach problems, dirreha and constipation, feeling sick whenever I ate, ect. I have had many tests on my stomach and nothing is wrong. I was diagonsed as IBS with excess acid in my stomach. I have been on protonix for about 6 years. Well, my stomach is somewhat better (as in I can function again) but I still have headaches daily. I had sinus surgery in Feb and the pain went away for a few months (after a long recovery) and came back. I am so tired all the time, my eyes hurt, light hurts them really bad. I feel like I want sunglasses on while sitting inside. It also feels like the world is spinning, like when you are drunk and move your head, the world takes a few minutes to catch up type thing. THis is happening more and more frequently. When I blow my nose, my right ear makes a screeching sound. Sometimes I get a really loud noise in my ear and the world goes silent for a few minutes (5-15 minutes). THis happens randomly (as in not when blowing my nose). Also, I feel nausous alot.
I had lasik about 2 years ago, and my eye exams since then have been normal. I had a MRI before my sinus surgery and that was normal. I do not have a thyroid condition, nor do I have low blood sugar. My blood pressure is also normal/low when I go to the doctor. I am not overweight, I eat 5 small well balanced meals a day - minimal sugar, caffeine, no alcohol, lots of vegetables. I am not stressed out (that I can tell) and am very happy with my life, so I don't think it's stress/anxiety.
I feel like I am going crazy.
Please help - I am going on vacation tomorrow, so i will check back in a week, thanks in advance.