Hello David. FYI, your derm is either misinformed, uninformed, or lying about this. Sexual side effects were determined to be associated with isotretinoin during an EMA review years ago and manufacturers were supposed to update the label to reflect this. This is the case in the UK at least. Whether this determination is actually being enforced in countries participating in the EMA outside of the UK, I don’t know.
Please give it some time. I greatly improved within 6 months after crashing from Accutane. Not a recovery, as I’m still suffering issues 22 years later, but much better than during the first couple months after crashing. I couldn’t have survived in that state. Just hang in there. Good signs that other symptoms are noticeably improving for you.