Hello, Let Me Start With That I Some Bulged Discs

Hello, Let me start with that I some bulged discs fixed a few years back. I got even better with physical therapy for awhile. Then it was just bearable. I had to jump backwards off a trailer a few weeks ago to keep from falling. That night at work I had to leave early with a weak and lightheaded feeling. This feeling comes and goes for 12 weeks now. A couple of spells I also felt nausea and pressure in my head. Have had the blood and urine tests, chest x-ray, CT scans and are waiting results of Echo and stress tests. Please Help!