RE: Numbness,
I had the same problem. I tried many saddles, adjusting the height of the seat, changing the stem, even buying an adjustable stem. Nothing worked until I bought a new bicycle and got a caring, knowledgable salesmen who spent a long time ensuring a good fit. I also bought awomens specific bicycle.
What a difference, not only did I resolve the problemof genital numbness, which can cause long term complications, but my nech and shoulders don't hurt on long rides.
I recommend going back to the shop and having them refit you on your current bke and if thatdoes not work, it is worth investing in a new one.
God Luck!
Maggie