Welcome to Healthcare Magic forum.
The symptoms you are having do resemble that of DVT and if untreated there is a significant risk of thromboembolism
and pulmonary embolism
It is advisable that you visit the ER at once and get the doppler test to confirm the diagnosis and start appropriate treatment.
Try to avoid any tight dressing on the affected limb and maintain circulation of the limb.
Drink plenty of water and avoid any sudden movement of the affected limb.
Wish you a speedy recovery.