No tips but sympathy - I have had this since about 30 weeks, now almost 38. If it's any consolation mine doesn't seem to have worsened any - it just kind of started and has stayed the same. Some mornings are worse than others but I've not been able to work out what (if anything) triggers it to be worse.
I'm 33 weeks been getting the same. I have chubby small hands so now it looks like I've got sausages for fingers lol. My hubby has been giving me hand rubs which takes the pain away, I find my fingers feel stiff on a morning but I think it's because I'm laying on my arm on a night.