Had rib and chest pains it has now passed. my ribs only hurt now depending on the position which i lie down. should i still visit a doctor ?

Depends: Depends on your risk factors, and if there are other symptoms (shortness of breath, fever, how severe the pain was, family history etc). Based on your age, the most likely problem is inflammation in your rib cage, so if you feel normal (with the exception of lying on the affected site) then it is probably safe to monitor your symptoms. If symptoms worsen or fail to resolve, see your Dr!