Your sit bones will get used to your saddle, but your girly parts never will. You need to adjust the bike fit or switch the saddle to get some comfort.

I don't think the lbs guy should have dismissed you like that. You can try tilting the saddle down just a bit, but you don't want to be sliding forward at all. You can also try moving it forward.

WRT the blister, are you wearing bike gloves?

Good luck.