Ok, so when they put the new seat on they also lowered the bars- this might tend to make you tip more onto your front pubic area. Perhaps you are riding more now in preparation for your race, and that's why the pain is showing up more now than before?
I cant imagine trying to train and race with such rawness as you describe....actually cut and stinging in the shower? Yikes.
I'd say you should go back to the person who fit you right away and get re-fit with the goal to take pressure off the front pubic area. Don't be embarrassed when you do this- a good bike fitter deals with this problem all the time- with both men and women.
Another tip
in the mean time is to try to ride your bike while distributing your weight more evenly between your saddle, your feet, and your hands. Don't ride like you are just sitting on a chair...ride like you are a
part of your wonderful bike machine- walking/running
inside your bike. I know that sounds nutty but this mental trick can help and might get your body weight a bit better balanced while riding.
But do go get the fit adjusted- there are various things they can do to get your weight back onto your sit bones where it won't hurt so much. See if they will do a change without charging you for another fit session- tell them the last adjustments are causing pain.