I had a bike accident on 14th may. a car hit from behind and me and wife fell down on left side. ribs started paining after about 4 days..

Consultation advised: If you are saying that you fell on your left side but didn't develop pain till 4 days later, that would generally indicate that you didn't sustain a rib fracture(which would be very painful on breathing the day of the fall). Where is the location of the pain? Is there any tenderness? Does it hurt to breath? Consider a Health Tap Prime consultation for more specific advice.