Living in fear of having or developing a brain aneurysm or a bleed on my brain. is this rare? i get headaches, sharp stabbing pains & dull pressure.

Yes, rare: There are many much more common causes for head ache or head pains than aneurysms. Try to figure out why you have developed this fear. Did you know someone who had this. The fear is probably making the headaches worse. Tension is a major cause of headache. Consider a trip to your doctor and then to a therapist if your physical exam is normal.