I filed this year using turbotax self employed. I am not self employed I have W2.The irs has accepted my return. It's been over 21 days and they say it's still being processed.Should I be worried?

The TurboTax Self-Employed edition includes the software for someone who needs to file a Schedule C to report self-employment income and expenses.  If you entered only a W-2 then there is no reason to be concerned as your Form 1040 was filed with just the tax data you entered.

The 21 days is Only an IRS Target, it is NOT a guarantee.

After the tax return has been Accepted by the IRS (meaning only that they received the return) it will be in the Processing mode until the tax refund has been Approved and then an Issue Date will be available on the IRS website.
See this IRS website for federal tax refund FAQ's - https://www.irs.gov/refunds/tax-season-refund-frequently-asked-questions