About three weeks ago I lifted something very heavy over the top of a dumpster. Just as it went in I got this severe pain in the top of my head like it was going to explode. All I remember is sitting down and holding my head. My eyes were closed and I couldn't open then. It felt like I sat there for awhile but it was probably about five min. I get bad migraines but never anything like that. Yet I didn't go to ER until next morning. I went five times that week. Every time my head felt like it was going to explode. It would happen just bending over. They did ct and spinal and found nothing. Should I be nervous of brain aneurysm or would that not have symptoms that I had?