Talk to Gynecologist on Iv Drip Pain

I’m 7 months postpartum, the place where i got my iv drip still hurts alot, initially would cause pain in my thumb so I couldn’t move bend or even hold things with my hand. Now that pain has moved to my forearm and it’s the nerve i think which has alot of pain like abhi bhi when i move my thumb toh I still have pain but now it’s in the nerve which goes uptil my forearm earlier I couldn’t move my thumb but now it causes pain in the nerve. Every time i try to move or bend my thumb i feel something getting twisted or getting stuck while moving. I had clotting on the 3rd day of my delivery in the drip. Below I’ve attached a picture of the site where they injected the IV, pls check that and advise what is causing the pain and treatment