Roadsidetreasurehunter, as other responders have said: You'll Be Fine.
Don't look for another job - look for ways to retire earlier than 2020.
TODAY, you have enough taxable savings/investments to cover just over 2 years of expenses, and if my calculations are correct, that's all you'll need in taxable accounts to carry you from age 58 to age 59-1/2. After age 59-1/2 you can withdraw from your Roth-IRA without penalties.
Recommendations:
Continue maxing your 401k, and taking the company match (if any).
Once you leave your current job, rollover the 401K into a rollover traditional-IRA.
Start a
Roth-IRA-Conversion-Ladder converting the t-IRA into the Roth. BUT... wait until after age 59-1/2.
Over the 10 years between age 59-1/2 and age 70, gradually convert your rollover-IRA into the Roth-IRA - paying taxes on any gains on the converted amount so that by age 70 everything is in the Roth-IRA [and nothing remains in the t-IRA which would be subject to annual minimum payment distributions].
Knowing that in FI, your biggest expenses will be taxes, and utilities, will your expenses be the same in FI?
If your expenses remain at $22k/year in FI, your FI number is $550K. You've saved $110k to date - $440K to go.
Can you save ~$90K / year between now and 2020? (in a combination of 401K, Roth, and Taxable accounts)