Am I a Norwood 2 or 3?

Hello all,

I am 26, 5'11", 165 lbs. I noticed my hairline receding about 4months ago. 3 weeks ago I started using rogaine foam. I've been told by a couple friends that I should be using finasteride as well. I know everyone says they are worried about the side effects and all, but I have had social anxiety and panic attacks since I was 14 and I'm worried the side effects could make it worse.

Anyways Summary of Questions:
1. Am I a norwood 2 or 3?
2. Should I use finasteride as well as rogaine foam?
3. Would the shedding phase happen again if I did?