De quervain's tenosynovitis

I have been diagnosed with this about 2 months ago. I have had it since June. I had the splint that they gave me and I wore that for a few weeks,didn't help. I went back and they gave me a shot into the tendions,it seemed to make the pain ease of for a week or 2 but is now back just like before. Anyone else had this problem? How did you get rid of it? I have a 9 month old baby(I adopted) that I have hardly been able to pick up for months now 😢 please help!!