I feel very tired and sick also i cant sleep as...

what is the possible cause of medical condition ?
general pain can be cuase by many medical conditions such as :
1. life style 
2. some types of mediction as a side effect 
3. high blood pressure 
4. injuries 
5. secondary to chronic diseases ( usually have other sings and symptoms ) 
6. infections ( usually have other sings and symptoms ) 
General advices to cope with medical condition
1. regulat your meals and have healthy eating habits 
2. avoid fast food & and oily meals 
3. avoid suger and alcoholic or soft drinks
4. have plenty of rest 
5. exercise regularly 
6. drink plenty of water 
7. avoid stress and anxiety 
8. take ibuprofen to relieve pain 
9. if you still have pain or other symptoms  , consult an internal medicine doctor 
What is the needed tests ?
1. physical examination
2. blood test 
3. vitals test