Numbness on tip of middle finger. Take.

I am feeling numbness and less pain, on the tip of my middle finger in right hand from last 2 weeks.. it happened after I lifted very heavy grocery bags in supper market for long and after coming back home I felt pain in right hand fingers..but by the night time middle finger had numbness and much pain..I consulted my family doctor and he suggested zerodol p for 5 days 2times a day, for 3 days, and nervijen np for 5 days once a day..after medication my pain reduced..but still I feel little numbness on tip of my middle finger in right hand..like if I touch or press aything with that finger then it doesnt feel smooth.. some feeling of numbness and little pain comes.. kindly suggest what should I do..any other medicine to take..