What you need to do now is to not drop out. Stay in until the end by all means. BUT, agree -- in exchange for more power in determining the platform and whatever else you can get -- to go back to expounding on the issues instead of attacking Hillary personally.
I'm sure you don't want to hear this, but you started losing women voters when you started saying Hillary was "not qualified." Hillary won female voters in NY by a whopping 61% to 39% -- a 22% margin and far higher than in previous primaries.
You want your issues to win? Then make it about that instead of about her.