Thanks for writing to HCM
You didn't mentioned your age.
You need proper clinical examination and investigations.
Investigations include routine hemogram,RBS,LFT,RFT,Lipid profile
of abdomen,ECG in all leads,ECHO, Chest X-ray (PA),Upper GI endoscopy
There may be various reasons for pain.It may be due to cardiac,respiratory,gastrointestinal or musculoskeletal causes.
Treatment depends upon clinical findings and investigation reports.
Ruling out of DVT is fine.Other conditions of venous prominence like varicose vein
needs to be ruled out.
Get well soon