I am a 22 year old male. i have just undergo what i define a moderate weight loss because of epigastric pain. i am concern of whether i have a blood clot, or diabetes. first my right leg from my butt down to my calf has a dull ache and my right neck.

Need to examine: Any unintended weight loss needs to be evaluated. It is not feasible to provide a meaningful opinion without additional history, physical examination and may be some tests. It would be prudent to see your doctor. Wish you good health!

Diagnosis?: I agree with Dr. Singh. We can't possibly diagnose this with the available information. This does warrant medical assessment. Take care.