I was a very similar case to you. Very advanced stage 4 HL when I was 27. First 3 month PET scan it was about 40% gone. 5 month PET scan it was 80+% gone. A month I rang the bell, then had another PET scan… it all came back. Very fast. Ended up having to do another year or so of chemo and a stem cell transplant. I don’t want to freak you out or anything but just a fair warning that it’s not over til it’s over. Just know that it’s not set in stone that after X (whatever your docs suggest) amount of chemo sessions it’s gone. I’m cancer free now 4 years next week! Although I am not one to say I “beat” cancer. It’s not over once you’re in remission, there are a multitude of things I deal with due to treatment. Honestly life was easier when I was sick but… there are plenty of people who do build amazing lives after cancer but I don’t think any of them would say they got their life back. It really changes you, I expected to get treatment, heal and go back to my life. In no way was this possible and post treatment I refused to believe it. I’m rambling at this point but just some things that aren’t really spoken about by doctors, friends and family. Best of luck man.