opinions and comments of people

Q: I am 28 years old and feel problems in learning and understanding things. I am physically weak but I worked hard in education and reached Software Engineering level and passed it. I faced many diseases since childhood but now I have no apparent disease besides I am still weak. I undergone my medical tests but doctors told me that I have no significant problem. In daily life I feel problems in doing, understanding and learning things. And due to these problems I spent plenty of time on researching about mental and Psychological health issues which makes me exhausted besides wastage of my time. Most of the time I feel depressed. Real problem is that when I compare my self with my other fellows, I feel disappointed regarding my abilities. I also feel that my relatives also compare me with others and they feel that I am not doing up to the standard. Now I want to ask that did Allah Almighty create every person with equal abilities? Or are some people born with problems? How can I be satisfied with my present abilities? Some doctors and other people told me that I have no problem just have over sensitivity that makes me anxious. I feel disappointed when I solve a problem in 3 hours but others solves it in 3 minutes. I feel comparatively deficient. Please read my problems carefully and guide me according to Islamic teachings so that I may be able to live a healthy life.