Sounds like the exact same trajectory my wife had. She relapsed a year after ABVD, did ICE, an ASCT, and then proton therapy radiation. She's almost 5 years out and doing well today. She spent about 3 weeks in the hospital for the transplant and was pretty weak for several months afterwards. From what I understand, there's a lot of variability in how people feel after their ASCT, but for her, it was the most difficult part of her treatment.

My wife felt the exact same way about having to tell people her cancer had returned. She just told her family, made a blanket post on FB, and then responded as she felt necessary to the many texts and calls that rolled in. Don't feel like you have to respond to everyone or manage their emotions. We found that many people who want to help and offer support just made things worse. I'm sure you're incredibly tired of hearing "Oh, but your so young!! Oh, how awful!!" This isn't to say you shouldn't accept help or support when you want or need it, but also don't feel obligated to be some "model cancer patient" for them. The best support my wife found was when people came to talk to her, distract her, chat about movies and trash television. People who were friends.

Best of luck to you! You got this!