The $1.7 million you have now would support spending of $68,000/year, with a 4% withdrawal rate. waltworks is right--there's no financial reason for you to continue working. Even though you'll take a 10% penalty for withdrawing from your 401k early, you have way more than you need. TODAY.
If you choose to work another 7 years, and continue to save, your savings is likely to double, allowing you to spend a whopping $136,000 per year.
On top of that, if you provide some of your income via consulting or freelancing, that'll displace some of the income you'd otherwise need from your 401k, which would reduce your penalties.
On top of that, it won't be that long before you can start taking Social Security, which will likely reduce your withdrawal rate to well under 3%.
In answer to your questions:
1) Call Fidelity and ask them.
2) That's what I'd do.
3) You've already won the game as of today. Forget working another seven years.