Have you read Elizabeth Pantley's book The No-Cry Sleep Solution? or Jay Gordon's book Good Nights? Both advocate gentle techniques for getting your baby to sleep without nursing. Gordon's book in particular has a gentle nightweaning plan.
For weaning in general, there's Kathleen Huggins' book on The Nursing Mother's Guide to Weaning.
I don't know that "medical professionals" are the ones to tell you how to wean - most doctors and nurses don't have a clue about breastfeeding!
22 months is great - good job!
And welcome to MDC, I hope you find the help and support you need here.
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Now that ds is 3, he has a toddler bed in our room, which is His bed. He can still come up with us, but usually ends up back in his own bed, because there is also a 7 mo old baby in the bed.
For nightweaning, do a search in this forum. Also try Dr. Jay Gordon's website. A lot of folks do some version of what he suggests for nightweaning. I think it is www.drjaygordon.com