What is the Time Frame for Steroid Injections on Tip After Rhinoplasty?

I had a second open rhinoplasty 5 weeks ago - first one was closed. Now the tip looks different from the rest of the nose: so swollen, it looks like two noses were merged together. I understand that is possible to have accumulated scar tissue after the first rhino. Hence it's not swollen and it might never go away.But steroid shots could fix this without additional surgery. I would rather wait the required 3-6 months and and only after use the shots. My question: is there a deadline for using the steroid shot or after a certain period is it too late? Thanks.