Thanks for writing to HCM
You didn't mentioned your age.
You need proper clinical assessment and investigations.
You need routine hemogram,RBS,RFT,Lipid profile
,LFT,Chest X-ray(PA view),Ultrasound
of abdomen,ECG in all leads, Upper GI endoscopy
,TMT and ECHO.
Swelling at the site of sternum
and neck region needs evaluation.
CT Scan may be done if needed.
Also you need ENT consultation for feeling of stickiness in throat.
Treatment depends upon clinical findings and investigation reports.
Get well soon.