I am very stress due to neighbour dispute, cannot sleep well at night. this kind of problem already two years. any doctor can help?

If the dispute can: Be mediated - great. If not - take good care of you. To address stress: talk about feelings ; address problems. Don't avoid them. Aim for 7.5 - 8 hours of sleep/ night. Daily physical activity is optimal in a green space. Eat healthfully. Cut out junk carbs, caffeine ; alcohol (or moderate). Try qi gong, tai chi, acupuncture, acupressure, homeopathy, meditation, yoga or exercise program.