1: Shaving can it be done? Should it? What's the easiest way if there is an easy way?
Your choice. Yes. Razor in the shower, just like at home.

2: Going it alone, is there many creeps out there to be worried about?
Don't "worry" but do be aware. If you think someone is creepy, they probably are, so extract yourself from the situation. Don't tell people too much about where you are going/sleeping, don't accept invitations if they don't feel right, it's ok if someone doesn't like you, it's more important to be safe. You can make up imaginary friends just up the road if needed.

3: Should I carry a knife? Spray?
I carry spray for bad dogs and bad people, haven't used yet, don't count on it being there/working, see #2

4: What's the worst type of area to watch out for?
Roads with heavy traffic. Anywhere the people are really poor and drunk. Big cities.

5: What to do in bike short with that time of the month?
If you can't figure this out, uh....???? Tampons are the same in bike shorts as regular clothes.

6: Anything else I have forgotten goes here.
Have extra budget. Money solves a lot of problems - like where to sleep if it's too dangerous to camp, what to do if your bike breaks, how to get home if you aren't having fun.

Have a great trip!