How To Relieve Swollen Joint In Finger With Bending And Griping Problem?

I injured my thumb four weeks ago when I caught myself in a fall. The xrays were fine with the exception of one, a doctor thought there could be a scaffoid fracture but seeing an ortho doctor she said she didn't think so as I didn't have tenderness in the snuff box. However, my base joint is swollen between the webbing of index finger, lump on the thumb at the lowest joint and I still can't bend it fully forward, my grip is bad, I don't have full strength such as squeezing motion. I can move the joint around, no problem, but when I bump it it's excruciating and I can't bend it still. I have no clue what to do here.