zahavasdad- I think you might be talking about Rav Dovid Goldwasser. He has a book out on ed’s too I think.
I had an ed in hs and my teacher asked our halacha rabbi (who is also a posek in the community and all around) and he said I wasn’t allowed to fast. Later I found out that from then on I wasn’t allowed to fast EVER again because if a person fasts for even one day after having an ed they might start to enjoy that feeling of being empty or of controlling the amount of food they put in their mouth. I didn’t listen to this and b”H haven’t had a problem with it but it definitely is something to think about.
Blabla- you can do it!! Stay strong, you can and will get over this!