For the painful orgasm (dysorgasmia) you might talk to your doctor about
tamsulosin (Flomax) which seems to help, at least in the research I found. The research is several years old but if there is more recent research I didn't find it. But then again I only spent a few minutes searching.
Here's a link to a page that pulls together the more helpful of the research I found:
ustoowichita.org/pdf/Orgasmic%20Pain%20following%20RP%20or%20RT.pdfAs to your ED we will need more information about
what you have tried before we can suggest what to try next. What sort of injections did you try and how did they fail to work? Injections work for nine guys out of ten.
Welcome to the forum, by the way, since you are mostly new. Sorry you find yourself here but glad you found us.